Retevis RT-388 User manual

SCAN SCAN
RT388
Kids Walkie Talkie
User’s Guide
US

Before initial use, please check if the product inside the
box is in good condition or not. If there are any signs of
damage or missing parts, please feel free to contact the
carrier or seller.
Item Included
Walkie Talkie
Belt Clip
User’s Guide
Speaker / Mic
/ Charge Jack Lamp
Quantity(Pcs)
2
2
1
Product Inspection
Each unit takes 4 AAA batteries
Batteries are not included in the package. You need to
prepare batteries first to get the units work, and we
recommend you always using high quality AAA Alkaline
batteries.
Product Features
Radio Parts and Controls
Read this operating instruction carefully
before using your Retevis RT388 two way
radio, including the part on Product Safety
and RF Energy Exposure Compliance
CAUTION
SCAN
Lamp
Channel /
Menu Item
CTCSS /
Menu Option
Power Button
TX / RX Icon
Volume
MENU Button
Microphone
Up Button
Monitor Button
Scanning
Antenna
Vox
Lamp Button
Call Button
Down Button
Keypad Lock
Scan Button
Battery Level
Talk Button
Speaker
1

Belt Clip
Kids can clip the units to their pocket or elsewhere while
they are on the go.
Call Tone Button
By pressing button , you can inform other radio users
in your group that you want to talk or have finished
talking. When button is pressed, a tone would be
transmitted.
LCD Display
Various information accessible at one glance, including
channel number, CTCSS code, volume level and other
status of the radio.
On/Off Power Button
Press and hold this button to turn on/off the radio.
Lamp Button
By pressing “LAMP” button to turn on/off the flashlight.
Convenient for those who use the radio at night.
Scan Button
Press button to detect channels with activities or
stop scanning.
MENU/ Button
Switch on/off the functions you want to start or stop.
You can also lock the channle by this button.
Monitor Button
Enable you to continuously monitor weak signals.
Talk Button
Press and hold this button to talk and let go to listen.
Up and Down Key
To select channels, set CTCSS code, adjust volume
level, listening volume and other usage.
Speaker/Mic/Charger Jack
You can use the unit with external speaker/ Mic, or give
the unit a charge through this jack.
Product Features
Product number
Frequency range
Channel number
Channel spacing
Working voltage
Frequency stability
Operating temperature range
The antenna impedance
Overall dimensions
Weight
RT388
FRS
22
12.5KHz
4.8V
±2.5ppm
-20℃~50℃
50Ω
140*55*28mm
79g
TECHNICAL PARAMETERS
Rf power
Modulation method
Noise and harmonic
Residual Radiation
Modulation distortion
Maximum deviation
0.5W
11kΦF3E
<-40dB
≤-35dB
≤7%
≤±5KHz
TRANSMITER
2

How to assemble and remove the belt clip
Slide the clip into the slot on the back of the radio until
it is snapped into place.
-To remove
Gently pull the lock tab, and then push up the belt clip
to remove it from the radio.
Installation
Turning on the radio
Press and hold button for three
seconds. A short audible beep and
a display of the LCD screen shows
that the radio is on.
Operation
How to install or replace batteries
Make sure the radio is turned off;
Remove the belt clip;
Slide and lift the battery compartment cover;
Insert 4 AAA batteries with correct polarity into per radio;
Close the battery cover and attach the belt clip.
(Note: Please remove the batteries if the units are not
used for a long time)
How to attach the strap to the belt clip
Thread the strap through the hole on the belt clip;
Thread the other end of the strap through the string,
then pull it to secure (See Pic 3).
Product Features
The sensitivity
Modulation receiver bandwidth
Adjacent selective
Intermodulation interference resistance
Spurious response inhibition
Audio output power
Audio distortion
Channel
1
2
3
4
5
6
7
8
9
10
11
Frequency
462.5625
462.5875
462.6125
462.6375
462.6625
462.6875
462.7125
467.5625
467.5875
467.6125
467.6375
Channel
12
13
14
15
16
17
18
19
20
21
22
Frequency
467.6625
467.6875
467.7125
462.5500
462.5750
462.6000
462.6250
462.6500
462.6750
462.7000
462.7250
Pic 1 Pic 2 Pic 3
≤0.2uV
±5KHz
≥40dB
≥35dB
≥70dB
≥300mW
≤8%
RECEIVER
3

Turning off the radio
Press and hold until an audible beep is heard and
the screen disappears.
Adjusting volume level
Use the up/down key to increase or
decrease the volume. And you can
always find the volume level indicator
in the lower right corner of the screen.
Receiving
The radio is ready to receive signals when it is tuned to
the channel that has the same frequency and CTCSS
code as the one that is transmitting. To receive signals,
you also need to leave this very radio’s TALK button
untouched. When signals have been received on the
current channel, RX icon will appear in the lower right
corner of the screen.
Transmitting
Press and hold “TALK” button to talk
to another person. Release the button
for response.
TX Icon will appear in the lower right
corner of the screen when radio is
transmitting.
To get maximum clarity, please speak directly to the
microphone and hold the mic 2 inches from your mouth.
Note: RT388 can only work together when the units are
tuned to the same channel and have the same
CTCSS code on that channel.
Channel Lock
Press and hold MENU button until
icon appears on the screen, which
indicates that the radio is locked to
the current channel, namely, you
cannot switch it to another channel
under this status.
To unlock the channel lock function, press MENU
button again for about 2 seconds.
Flashlight
The radio is equipped with flashlight
function, which will bring a lot of
convenience in the dark.
Press “LAMP” button to turn the
flashlight on. And the process to turn
it off is the same as turning it on, just
press “LAMP” button, that’s it.
Select Channel
These units have 22 Channels available for US and
Canada market.
To select any among the 22, you need press MENU
button once, then the channel number on the screen
will blink;
Using up/down key to select the channel you want to
communicate on;
Press TALK button to choose the desired channel and
return to normal mode. Or press MENU button to confirm
the channel and go to set CTCSS code.
4

Set CTCSS Code
Within a channel, you can partly
avoid interference from other radios
by setting CTCSS code (01-38)
while code 00 refers to no privacy
code is selected. To select any
among the 38, you need press MENU button twice,
then the CTCSS code on the screen will blink;
Using up/down key to select the code;
Press TALK button to confirm the desired code and go
back to normal mode.
Note: RT388 can only work together when the units are
tuned to the same channel and have the same
CTCSS code on that channel.
VOX for Hands-free
When VOX is activated, there is no
need to press TALK button to talk.
Tap MENU button three times, then
“VOX” and VOX sensitivity level
(OF,01,02,03) will be displayed on
the screen.
You can adjust VOX sensitivity level by pressing up/
down key.
Note: OF means VOX function is inactivated; 03 is the
highest sensitivity setting and 01 the lowest.
Therefore, level 03 is recommended when the
radio is used in quiet surroundings and 01 for
noisy environment.
Select Call Tone
To inform other radio users in your group that you want
to talk or you have finished talking by transmitting a
tone to their radios.
Press MENU button four times,
then “CA” and call tone number
(01, 02, 03, 04, 05, 06, 07, 08, 09,
10) will blink on the screen;
Using up/down key to select the
tone you prefer;
Press TALK button to confirm the desired tone and go
back to normal mode.
As to how to send the desired call tone to another party,
please go and check “ Call another party” on Page.
Channel Scan
Convenient to detect channels with
activities.
When button is tapped, the radio
will automatically scan for channels
with activities. The scanning will
stop when channels with activities are found, and the
radio will play what it detects on that channel.
To continue the scan, just press button .
Note: When a channel with activities is detected, you
can join the conversation and back away from the
scan by pressing TALK button.
Call Another Party
Press button to transmit a call tone to
other radios in your group so that they
can be prepared when you want to talk
or you have finished talking. (See how
to select call tone on Page)
Note: Another party can only receive the call tone when
the following requirements are met at the same
time.
vox
5

1.The receiving unit is on the same channel and shares
the same CTCSS code as the unit that sends the call
tone;
2. The receiving unit is within the communication range.
Monitor
To receive weak signals from other
radios in your group, all you need to do
is press MON button.
If you want to continue the monitoring,
please press MON button for at least
3 seconds. And press MON button again to stop.
Battery Level Indicator
Displayed in the lower left corner of the screen,
convenient to know how much battery power is
remained.
When the indicator on the screen blinks, it means that
the batteries need to be changed(when using regular
AAA batteries) or charged(when using NiMH
rechargeable batteries).
External Headset/Microphone Jack
The unit support external headset connection.
To talk or listen through an external earpiece,
you need to remove the rubber hole cap at the
top of the unit, insert the favorable/suitable
headphone plug into the accessory jack, and
then put on your earpiece.
Charging(Optional)
If you want the units to be rechargeable, please use
rechargeable AAA batteries (not included).
Then you can charge the units by
plugging the charger(not included)’s
connector into the accessory jack
and then connect the other end of
the charger to a general socket or
somewhere else alike.
Below is information on specially
designated charger and rechargeable AAA batteries.
Note
When external earpiece is applied
Please adjust volume level accordingly.
Turn the radio off immediately if your ears feel
uncomfortable or itchy with headsets on.
Don’t use the units in places that might cause explosion
or fire
Such as gas stations, unshielded electrical installations
and other unsafe places.
Simple Maintenance Tips
Gently wipe the dust or dirt off with a dry soft clean cloth.
Don’t use any cleaning chemicals, as they can damage
the units.
When the radio is dropped into water, turn it off
immediately. Dry the outside of the radio with a clean
and soft cloth. Remove batteries and dry them, too. Put
the unit in a cool dry place to dry out all moisture.
In case that any other problem or malfunction occurs
during your use, please don’t dissemble the radio’s
circuit or hardware by yourself. You are welcome to
send the unit back to the seller or contact our customer
service for help.
6

Annex I
Troubleshooting
1. Couldn’t turn the units on
A. Check if batteries are installed properly;
B. Check if batteries need to be changed (when
using regular batteries), or charged (when using
NiMH batteries)
2. When reception or transmission is poor,
A. Increasing volume level; Pressing Mon button to
receive weak signals
B. Check battery level
The Stylized RETEVIS logo are trademarks or register-
ed trademarks of Shenzhen Retevis Technology Co.,
Ltd. And are used under license. All other trademarks
are the property of their respective owners.
2017 Shenzhen Retevis Technology Co., Ltd. All rights
reserved.
Remarks:
1. This guarantee card should be kept by the user, no
replacement if lost.
2. Most new products carry a two-year manufacturer’s
warranty from the date of purchase. Further details,
pls read http://www.retevis.com/after-sale/
3. The user can get warranty and after-sales service
as below:
• Contact the seller where you buy.
• Products Repaired by Our Local Repair Center
4. For warranty service, you will need to provide a
receipt proof of purchase from the actual seller for
verification
Exclusions from Warranty Coverage:
1. To any product damaged by accident.
2. In the event of misuse or abuse of the product or as
a result of unauthorized alterations or repairs.
3. If the serial number has been altered, defaced, or
removed.
Model Number:
Serial Number:
Purchasing Date:
Dealer:
Telephone:
User’s Name:
Telephone:
Country:
Address:
Post Code:
Email:
Guarantee
7