Carscop CCTR-620 User manual

CCTR-620 GPS TRACKER USER MANUAL
Welcome to use this GPS tracker CCTR-620, This product is with GPS module and GSM
module, It has many new and unique functions, such as sending SMS with website link and
display location with Google map on mobile phone, sending current location with longitude &
latitude information by SMS, monitoring & listening sound around tracker, calling & talking to
preset phone, move alarm, over area alarm, over speed alarm, battery low alarm, changeable and
rechargeable Nokia standard BM-6P Li battery, emergency SOS help function, small size , no
installation charge, easy hidden, low using charge, no service charge(only SMS charge) etc.
INDEX
Usage scope
Packing list
Before using
Add/Delete/Check Preset Phone Number
Change / Check Password
Set langue
Set SMS locate mode after calling
Send a SMS trigger SMS locate
Set website map link locate mode after calling
Send a SMS trigger website map link locate
Set move alarm
Over Area Alarm
Over Speed Alarm
Real Tracking Mode
Cancel All Alarm Setting
Low Battery Alarm
Monitor & Listen Sound around tracker
Call and talk to preset phone
Set Power Saving mode (Set GPS On Off Interval)
“ SOS ”
Installation Guide
Notes
Trouble Shooting
Instruction List

Warranty
Usage Scope
It can be used as tracking cars, company vehicles, buses, taxis, trucks, elders, children,
outside workers, travelers, explorers, overlanders, pets, moving equipments, transportations,
criminals etc.
Our free latitude and longitude located website:
http://www.followmegps.com
Our free link located map website:
http://www.followmegps.mobi
Packing list
GPS tracker, car charger, home AC charger, manual.
USB Charging Wire Car Adapter
T he following is the optional accessory
12-24V DC Adapter Home AC Adapter (USA) Home AC Adapter (Europe)
Before Using
At first to buy a GSM phone SIM card which have SMS service and incoming caller ID service, and
then to install to the tracker, in which the SIM card phone number is the very tracker number and
all the operation for the tracker is to this number, such as locating immediately, add & delete
preset number, change password, enable over speed alarm, enable move alarm etc.
1. Power ON / OFF
When power is OFF, press the “ ON/OFF ” button till the LED is ON, then release the button,
the tracker is powered ON, when the LED flash means the tracker is working well.
When the power is ON, press the “ ON/OFF ” button till the LED turn off, then release the
button, the tracker is powered OFF.
When power is OFF, recharge the tracker, the tracker will power on automatically.

When the battery voltage in the tracker is too low, the tracker will power off automatically
2. Install SIM card: Pull out the battery cover and remove the battery, you can see the SIM
card holder under the battery, move the metal cover to another side, you can lift one side of
the metal cover, put the SIM card into the holder (Metal pin face down), and make the
cover fasten.
Note: Before install or uninstall the SIM card, please power off the tracker.
3. LED flash indicator
Green Power LED Flash once : working well
Green Power LED Flash twice : GSM working well and GPS signal weak
Green Power LED Flash three times : GSM and GPS working well but battery is low
Green Power LED Flash four times : GSM working well, battery low & no GPS s ignal
Green Power LED ON continuously : Searching network
Green Power LED OFF continuously : Power off
Blue GPS LED ON : GPS module is ON
Red GSM LED Flash fast : I ncoming or making a call or receiving a SMS
4. Recharge the tracker
Please check and confirm that the adapter model is suit for this tracker, for which we
recommend using OEM charger to recharge the tracker.
Warning: this tracker use the 5V DC voltage to recharge, so too high voltage or AC voltage
may damage the tracker or even cause accidents.
Use the car adapter to recharge the tracker: insert the USB wire into the tracker and car
adapter, If the LED on the adapter is RED, it means it is recharging, if the LED on the
adapter is GREEN, it means, it means the recharging is finished. This will take about 2-4
hours.
Use the home AC adapter to recharge the tracker: Same with the above, insert the USB
wire into the tracker and AC adapter, If the LED on the adapter is RED, it means it is
recharging, if the LED on the adapter is GREEN, it means the recharging is finished. This
will take about 2-4 hours.
When recharging, it can work as normal, It will take about 3-4 hours to finish the charging,
the adapter LED will turn to GREEN, when the battery low, the LED will flash three times,
and send battery low information to the first preset number. When the battery voltage is too
low, the tracker will power off automatically, but when you recharge the tracker, it will power
on automatically.

Theoretically the battery life can last about 3-5days, however the standby time should be
shorter in different actual situation. ( for example GPS continuously ON can reduce the
standby time to 1-2 days, also weak GSM signal can reduce the standby time etc.)
5. Back to default set
Pull out the battery cover and remove the battery, press the “ ON/OFF ” button and hold on,
insert the battery into the tracker, the tracker will power on, after the LED flash 10 times and
the LED will turn on continuously, release the button, the tracker back to default setting, delete
all preset phone number and password, the password is changed to default: 123456.
6. ANTENNA
The Antenna of GSM and GPS are built in the tracker.
Pleas leave the tracker away from big metal, this will reduce the GSM and GPS signal.
Using Condition
The working temperature is -20
0
C to 60
0
C, over this range the specification of the tracker maybe
can not reach the standard level, the storage temperature can reach to -40
0
C to 80
0
C.
Function Description
Add / Delete / Check preset number:
Preset Phone Number: user can set 3 preset phone number, this number is used as sending SOS
help, low battery alarm information and change/check tracker password and trigger the locating by
calling, only preset phone number can do these operation.
1. Add preset phone number by SMS
Send SMS “ ADDPHONE*123456*A*number ” (Not including the quotation marks “ and ” ,
Number means the telephone number you want preset, the following is same) to tracker is OK,
“ ADDPHONE ” is a command; “ 123456 ” is password; “ A ” is preset number location, every
tracker have is 3 preset phone number location, A , B and C, so you can preset 3 phone
number, if the add operation is success, the tracker will send back the
information ” ADDPHONE OK ” , if the command or password is not right, the operation fault, the
tracker will send back information “ ADDPHONE FAIL ” .
2. Delete preset phone number by SMS
Send SMS “ DELETEPHONE*123456*A ” to the tracker, “ DELETEPHONE ” is a
command; “ 123456 ” is password; “ A ” is preset phone number location, there is 3 location
“ A ” ，“ B ” and “ C ” ; if the delete operation is success, the tracker will send back the
information ” DELETEPHONE OK ” , if the command or password is wrong, the operation fault,
the tracker will send back information “ DELETEPHONE FAIL ” .

3. Check preset phone number by SMS
Send SMS “ CHECKPHONE*123456 ” to tracker, “ CHECKPHONE ” is a command;
“ 123456 ” is password; if the operation is success, the tracker will send back the information
“ CHECKPHONE A: 13322990998 ；B：13322990033 ；C：13316868198 ” , the phone
number is just an example.
Change / Check Password
1. Change tracker password
Send SMS “ CHANGEPASSWORD*123456*888888 ” to tracker, “ CHANGEPASSWORD ”
is a command; “ 123456 ” is old password; “ 888888 ” is new password; if the operation is
success, the tracker will send the information “ New Password ：888888 ” to every preset phone
number, if the operation fail, the tracker will send back information “ CHANGEPASSWORD
FAIL ” .
Note: Only preset phone can change the password.
2. Check tracker password
Send SMS “ CHECKPASSWORD ” to the tracker, “ CHECKPASSWORD ” is a command, if
the operation is success, the tracker will send back the information “ Password ：888888 ” ;
“ 888888 ” is an example.
Note: Only preset phone can check the password.
Set Langue :
Send SMS “ ENGLISH*123456 ” to the tracker, “ ENGLISH ” is a command, “ 123456 ” is
password; if the operation is success, the tracker will send back the information “ Set Langue
to English ” , If the command or password is not right, the operation is fault, the tracker will send
back information “ Bad Command ” or “ Wrong Password ” . After setting the langue to english, all
the SMS information is change to english, the default langue is english, also you can set the
langue to chinese, replace the command “ ENGLISH ” to “ 设置中文 ” is OK.
Set SMS locate mode after calling:
1. Send SMS “ SMSMODE*123456 ” to the tracker, “ SMSMODE ” is a command, “ 123456 ” is
password; if the operation is success, the tracker will send back the information “ Set
Report Mode to SMS ” , if the command or password is not right, the operation is fault, the
tracker will send back information “ Bad Command ” or “ Wrong Password ” .
Please note that this SMS is just a mode setting command, it will not trigger the tracker
locate immediately, Call the tracker or send SMSLOCATE SMS can trigger locate
immediately.

2. Under this report mode, using preset phone call the tracker, after ring 3 times, the tracker
will hang up the call automatically and locate immediately, about 30 seconds, the tracker
will send back the SMS location information (latitude longitude speed battery time etc) of
current location to the caller. If the tracker has not preset number, any phone call can
trigger the tracker to locate immediately and send back location, if the tracker has preset
number, then only preset phone call can trigger the tracker to locate immediately.
3. Basic Location information including Latitude, Longitude, Speed, Direction, Date & Time,
Battery etc. the SMS information sample is as follow:
Latitude:22.680206N
Longitude:114.146998E
Speed(km/h):45.0
Direction(Degrees):303.30
GMT:2008/04/25 08:29:06.000
Battery:91%
The first line is the latitude of the tracker.
The second line is the longitude of the tracker.
The third line is the speed of the tracker (the speed maybe is not zero if the object is not
moving because of the GPS precision)
The fourth line is the direction of the tracker( It is the direction of the tracker moving to,
from the north it is 0, and the east is 90, and the south is 180, and the west is 270, full circle
is 360, it is clockwise, the direction maybe is not right if the object is not moving because of
the GPS precision).
The fifth line is the GMT time and date, (this time is the world standard Greenwich time,
and this time is the 0 degree longitude line time, your local time need add or minus a fixed
number of hours, for example China Beijing time is GMT add 8 hours, it means it is 8 hours
earlier than GMT ).
The sixth line is the tracker battery capacity, if the battery is lower than 10%, tracker will
send battery low information to preset phone number.
4. If the tracker can not receive the GPS signal, it can not locate current location, then it will
send the last locating information to caller, and add a warning information “ GPS signal
weak, Last located: ” , the following information is the last locating information.
5. User visit our website www.followmegps.com to input the latitude & longitude can locate
tracker on the flat map or earth map, also user can use free Google Earth to locate the

tracker.
Send a SMS trigger SMS locate
Also send a SMS “ SMSLOCATE*123456 ” to the tracker, “ SMSLOCATE ” is a command,
“ 123456 ” is password; the tracker will locate immediately and send back the location
information (latitude longitude speed battery time etc) of current location to the caller. The
SMS example is same with above, if the command or password is not right, the operation is
fault, the tracker will send back information “ Bad Command ” or “ Wrong Password.
Set website map link locate mode after calling:
1. Send SMS “ LINKMODE*123456 ” to the tracker, “ LINKMODE ” is a command, “ 123456 ” is
password; if the operation is success, the tracker will send back the information “ Set
Report Mode to Map Link ” , if the command or password is not right, the operation is fault,
the tracker will send back information “ Bad Command ” or “ Wrong Password ” .
Please note that this SMS is just a mode setting command, it will not trigger the tracker
locate immediately. Call the tracker or send LINKLOCATE SMS can trigger locate
immediately.
2. Under this report mode, using preset phone call the tracker, after ring 3 times, the tracker
will hang up the call automatically and locate immediately, about 30 seconds, the tracker
will send back the SMS location information (map website link) of current location to the
caller. user can use mobile phone to click the website link to visit internet, and the location
will display on the map on your phone(the mobile phone SIM card need enable the GPRS
function). If the tracker has not preset number, any phone call can trigger the tracker to
locate immediately, if the tracker has preset number, then only preset phone call can
trigger the tracker to locate immediately.
3. Basic Location information including Map Website Link, Battery etc.
the SMS information sample is as follow:
http://www.followmegps.mobi/map.aspx?lat=40.756441&lng=-73.986378&l=en (World
Goolge map)
Battery:91%
The first line is the current location on the map website link, the other information is same
as above.
4. User use mobile phone, click on the link to visit the website, the location on map and
location description in text will display on your mobile phone. Also you can click + and – to
enlarge or reduce the map, the following is the example.

Send a SMS trigger website map link locate
Send SMS “ LINKLOCATE*123456 ” to the tracker, “ LINKLOCATE ” is a command, “ 123456 ” is
password; the tracker will locate immediately and send back the location information (map
website internet link) of current location to the caller. use mobile phone to click the website
link to visit internet, and the location will display on the map on your phone(the mobile phone
SIM card need enable the GPRS function), if the command or password is not right, the
operation is fault, the tracker will send back information “ Bad Command ” or “ Wrong
Password.
Set Object Move Alarm (Can be used as car alarm):
Send SMS “ SETMOVE*123456 ” to tracker, “ SETMOVE ” is a command, “ 123456 ” is
password, the tracker will send back the information “ SETMOVE OK ” or “ SETMOVE FAIL ” to
indicate the operation is success or failed 。
After set the object move alarm, the system will monitor the object continuously, if the
object is moving, the tracker will send alarm and location information by SMS to who enable
the alarm, and later every 5 minutes the tracker will send alarm information by SMS until the
tracker stop moving.
The object move alarm SMS is as follow:
ObjectMove
Latitude:22.680206N
Longitude:114.146998E
Speed(km/h):45.0
Direction(Degrees):303.30
GMT:2008/04/25 08:29:06.000
Battery:78%

Over Area Alarm:
Send “ SETAREA*123456*A22.670000N114.1 4 0000E*B22.680000N114.1 5 0000E ” SMS to
the tracker, “ SETAREA ” is a command, “ 123456 ” is password, “ A22.670000N114.140000E ” is
the longitude and latitude of the first point(Point A) location, “ B22.680000N114.1 5 0000E ” is the
longitude and latitude of the second point(Point B) location.
Note: the over area set need 2 point, it is A and B, Point A must be on the Left bottom of
the point B, the format of latitude and longitude of every point is as follow: Latitude format is
YY.YYYYYYN, it has 8 digits, the last is N or S, means north latitude or south latitude, if the
digit is not reach to 8 please add zero to 8 digits, Longitude format is XXX.XXXXXXE; it has 9
digits, the last is E or W, means east longitude or west longitude, if the digit is not reach to 9
please add zero to 9 digits, if the command and password is right, the tracker will send back
the information “ AREASET OK ” or “ AREASET FAIL ” to indicate the operation is success or
failed.
After set the over area alarm, the system will locate every 5 minutes and check the object
is in the preset area or not, if the object is go out the area, then the tracker will send SMS to
the phone who enable the alarm.
The over area alarm SMS information is as follow:
OverArea
Latitude:22.680206N
Longitude:114.146998E
Speed(km/h):45.0
Direction(Degrees):303.30
GMT:2008/04/25 08:29:06.000
Battery:89%
Over Speed Alarm:
Send SMS “ SETSPEED*123456*040 ” to tracker, “ SETSPEED ” is a command, “ 123456 ” is

password, “ 040 ” is the preset report speed, the speed must be 3 digits , from 000 to 999, unit
is Km/hour, the tracker will send back the information “ SET SPEED OK ” or “ SETSPEED FAIL ”
to indicate the operation is success or failed 。
After set the over speed alarm, the system will locate every 5 minutes and check the
speed of the tracker is higher than the preset speed or not, if the speed is higher than the
preset speed, the tracker will send SMS to the phone who enable the alarm.
The over speed alarm SMS is as follow:
OverSpeed
Latitude:22.680206N
Longitude:114.146998E
Speed(km/h):45.0
Direction(Degrees):303.30
GMT:2008/04/25 08:29:06.000
Battery:78%
Set Real Tracking Mode:
Send SMS “ SETTRACKING *123456*15M030T ” to tracker, “ SETTRACKING ” is a
command, “ 123456 ” is password, “ 15 ” is locate interval time, “ M ” means the time unit is
minutes, interval time is from 00 to 99, must be 2 digits, “ 030 ” is the preset total tracking times,
“ T ” means times, the tracking time is from 000 to 255, must be 3 digits, “ 15M030T ” means
every 15 minutes locate one time, total 30 times.
After set the real tracking mode, the tracker will locate the object once every preset
interval time and send SMS to preset phone with the location information, when it reach to the
max locate times it will cancel the tracking mode automatically.
Cancel the real tracking mode: Send SMS “ CANCELTRACKING*123456 ” to tracker,
“ CANCELTRACKING ” is a command, “ 123456 ” is password, the tracker will send back the
information “ TRACK CANCEL ” or “ TRACK NOT SET ” to indicate the operation is success or
failed.
Note: if you set the over area report and over speed report and tracking mode at the same
time with different, then the information SMS only send to the last one preset phone.
Cancel All Alarm Setting
Cancel all the alarm setting: Send SMS “ CANCEALARM*123456 ” to tracker,
“ CANCELALARM ” is a command, “ 123456 ” is password, the tracker will send back
information “ All Alarm Cancel ” , and cancel all the alarm setting in the tracker, including shock

alarm, over area alarm, over speed alarm, real tracking mode etc. if the command or
password is not right, the operation is fault, the tracker will send back information “ Bad
Command ” or “ Wrong Password ” .
Low Battery Alarm
When the tracker battery voltage is low, the GREEN LED on tracker will flash 3 or 4 times, and
then the tracker will automatically send battery low information to the first preset phone
number.
Monitor & Listen Sound around tracker
Send SMS “ MONITOR*123456 ” to tracker, “ MONITOR ” is a command, “ 123456 ” is
password, the tracker will call the user who send this SMS, after the phone is connected, user
can listen the sound around the tracker, the distance of the sound is about 3-10 meters.
Talking to Preset Phone:
Press button “ B ” or “ C ” on the tracker, the tracker will call the preset phone number B or C
that you have set, after the phone is connected, tracker can talk to the preset phone, the
tracker speaker should be closer to your ear so that you can hear clearly.
Set Power Saving mode (Set GPS On Off Interval)
Send SMS “ SETPOWER*123456*10 ” to tracker, “ SETPOWER ” is a command; “ 123456 ”
is password; “ 10 ” is interval time, it means every 10 minutes the GPS will turn on and receive
the location one time, the interval digit must be a 2 number, from 00 to 99, Unit is minute, if
the time is longer then the power saving is longer, 00 means GPS normally ON, and 99
means GPS normally OFF, (The factory default is 99, means GPS normally OFF, when
phone to the tracker to trigger the locating, GPS turn on. If the real tracking mode is set, the
GPS will normally ON).
“ SOS ”
Press the “ SOS ” button 6 seconds, first the LED will flash fast, then the LED will turn OFF,
release the button, the tracker will send help information to all the 3 preset phone.
HELP ！
Latitude:22.680206N
Longitude:114.146998E
Speed(km/h):45.0
Direction(Degrees):303.30
GMT:2008/04/25 08:29:06.000
Battery:68%

If the user receive the HELP information, please note that the help button must be pressed,
please confirm with the user it is safe or not, if it is not safe please call the police.
Installation Guide
The antenna of GSM and GPS is built in tracker, please note that the install location of the
tracker must can receive the GPS signal, normally the back of the seat or arm rest box or under
the back window or room on the panel etc. please leave away the tracker from big metal, and
please do not place the tracker under the big metal.
The tracker built in high capacity Li battery, recharge one time can use about 3-5 days, also
you can connect the tracker and DC adapter to the 12V car battery, this can keep the tracker has
power supply continuously, and not necessary recharge any more, please use the OEM adapter.
Notes
The tracker built in GSM and GPS module, so please power off the tracker at the special
place that restrict using mobile phone, such as on the plane, hospital, fill station etc.
The GPS need 10-200 seconds to locate the position, when the GSM signal is weak or the
network is very busy, the SMS maybe delay to send by the GSM network, this is normal.
Big metal can reduce the signal of GPS and GSM, so do not place the tracker on big metal,
and please keep away from the magnetic components.
Trouble Shooting
2. The tracker auto power off: please confirm the tracker battery can be used, try to recharge it;
and the SIM card has been installed properly.
3. If the tracker can not send back information by SMS, please confirm the SIM card should has
caller ID display and SMS service function, and the SIM card PIN code should be disabled.
4. The tracker has not any response, and no ring, please confirm the tracker has been power on
and the SIM card has enough charge, and the mobile phone can work well in that place.
5. All the SMS information is in English word, “ * ” is the star key, “” is not including in the SMS
information, it is just used to indicate the information.
Instruction List
Function SMS Information Note Reply Note
Add phone
number
ADDPHONE*123
456*A*13322990
998
Any mobile phone
can set
ADDPHONE OK
Reply to the
operation phone
Delete phone
number
DELETEPHONE*
123456*A
Any mobile phone
can delete
DELETEPHONE
OK
Reply to the
operation phone
Check phone
number
CHECKPHONE*1
23456
Any mobile phone
can check
CHECKPHONE
A：13322990998 ；
B：13322990033 ；
Reply to the
operation phone

C：13316868198 ；
Change password
CHANGEPASSW
ORD*123456*888
888
Only preset phone
can change
New Password ：
888888
Reply to
operation
phone that
been preset
Check password
CHECKPASSWO
RD
Only preset phone
can check
The Password:
888888
Reply to
operation
phone that
been preset
Set langue to
English
ENGLISH*12345
6
Any mobile phone
can set
Set langue to
English
Reply to
operation
phone
Set langue to
chinese
设置中文
*123456
Any mobile phone
can set
设置中文成功
Reply to
operation
phone
Calling trigger
SMS mode
report location
SMSMODE*1234
56
Any mobile phone
can set
Set Report Mode
to SMS
Reply to
operation
phone
Send SMS trigger
SMS report
location
SMSLOCATE*12
3456
Any mobile phone
can set
latitude &
longitude speed
direction time
battery
Reply to
operation
phone
Calling trigger
Map link mode
report location
LINKMODE*1234
56
Any mobile phone
can set
Set Report Mode
to Map Website
Link
Reply to
operation
phone
Send SMS trigger
map link report
location
LINKLOCATE*12
3456
Any mobile phone
can set
Current location
map website link
Reply to
operation
phone
Set object move
alarm
SETMOVE*12345
6
Any mobile phone
can set
SETMOVE OK
The alarm will be:
ObjectMove +
location
information
Reply to
operation
phone
Set over area
alarm
SETAREA*12345
6*A22.670000N1
14.140000E*B22.
680000N114.140
000E
Any mobile phone
can set
SET AREA OK
The alarm will be:
OverArea
+ location
information
Point A must be
at the east
bottom of point
B
Set over speed
alarm
SETSPEED*1234
56*080
Any mobile phone
can set
SETSPEED OK
The alarm will be:
OverSpeed +
location
information
Reply to
operation
phone
Set tracking mode
SETTRACKING*1
23456*xxMyyyT
Any mobile phone
can set
SETTRACKING
OK
xx is 0 to 99,
unit is minutes,
yyy is 001 to
255, every xx
minutes locate
once, total yyy

times.
Cancel all alarm
setting
CANCELALARM*
123456
Any mobile phone
can set
ALARM CANCEL
or ALARM NOT
SET
Reply to
operation
phone
Monitor & Listen
sound
MONITOR*12345
6
Any mobile phone
can set
Call the user and
monitor sound
around the tracker
Reply to
operation
phone
Talking to Preset
Phone
Press Button B or
C
Call and talk to
the preset phone
B or C
Call the preset
phone
Set power saving
mode
SETPOWER*123
456*xx
Any mobile phone
can set
Set Power Saving
OK
xx is 00 to 99,
unit is minutes,
00 is normally
ON, 99 is
normally OFF
(Default is 99)
SOS
Press SOS button
until the LED
TURN OFF
Send HELP
information to all
preset phone by
SMS
Send
information to
preset phone
Notes
1. Please add preset phone first then change the password.
2. All the SMS information is in English word, “ * ” is the star key, “” is not including in the SMS
information, it is just used to indicate the information.
Electric Specification
GSM Frequency 850/900/1800/1900 MHz GPS channel 32 个
GSM / GPS Antenna Built in Standby Current 2-5 mA
Locate precision 10-20 Meters Recharging Current 5V/300mA
GPS working Current <50mA GPS Cold Start Time 36 seconds
Working Temperature -20
0
C to +55
0
C GPS Hot Start Time 1 second
Storage Temperature -40
0
C to +80
0
C Absolute Temperature -35
0
C to +70
0
C
Battery Li-ion 800mAh (BP-6M)

Warranty
This system has been tested before sold. Before installing or using if you have any problem
please contact the distributor for help . There is a one-year warranty except the following condition:
1. Installed, fixed, or changed by personally or unprofessional.
2. Warranty will eliminate if the ownership of the tracker has been changed.
3. Parts damaged by man-made.
4. Battery, adapters, wires, etc.
Warning: this device is just a n auxiliary product that apply the location of current object, we have not
any responsibility if you have damage or lost in using this tracker.
Customer
Addr
Date year month day
Model CCTR-620 Serial Number
Distributor
Notes: The explanation of this manual is belonged to our company, some small changes may not notice
customer, if you have any problem please contact us, thanks!