Retekess T128 User manual

W AT C H W IR E L E S S
CALLING RECEIVER
U S E R M A N U A L
T128

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Watch wireless calling receiver
I Preface
The product concentrates the technology of wireless transportation,
digital identify, dot matrix LCD display and microprocessor together to
realize the functions of time display and wireless calling. The product
uses removable rechargeable battery with long standby time and safe
charging circuit.
The fashionable watch design makes it widely used in restaurants,
bars, cafes, hospitals, hotels, and factories and so on.
II Feature
• RF wireless technology
• Fashionable watch design
• Dot matrix LCD screen
• Up to 999 channels
• Call button data pin support for custom
• Call button words selectable
• Single or list display mode
• Accurate time display
• Vibration/Buzzer prompt
• Low-power indication
• Built-in removable rechargeable battery

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III Technical Data
1) Working voltage: DC3.7V rechargeable Li-poly battery
2) Working frequency: 433.92MHz
3) Working current: 57mA±10mA (buzzer mode)
95mA±10mA (vibration mode)
4) Standby current: <8mA
5) Power-off current: 180±5μA
6) Receiving sensitivity: -108dBm
7) Decoding: learning code
8) Modulation: AM
IV Diagram
1. Diagram of function
Saturday
28/07/2018 17:17
00
Power capacity
Set / OK
Up
Down
Power / Back
Signal
LED Indicator
Power in
(back side)
Date & Time
Week

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V operation
Setting key, confirm key, choose bit key
Increase or decrease number; check up and down history call
Exit setting; cancel key (can cancel call number from screen)
1 Add caller
1. Press “ ” key showing “add caller ”
2. Press “ ” key to confirm , showing “add 0001 ID”
3. Press “ ” key and “ ” key to choose number you need.
“ ” key use for adjusting the number you need in setting state. Use
“ ” key can choose from “0-9” and “A-Z”. “ ” key is use for
selecting the bit in setting
4. Press any key on the transmitter till you hear a di sound and “done”
words show in screen. While number will goes to next one. For example,
choose “0001”, and press call key from button. When saving is
successfully; the receiver will have di sounds and “done” words show in
screen. Number will show 0002. You can go on press button to save next
number, till all number save.
5. When all finished, press “ ” to exit the setting state.
2 Delete caller
1. Press “ ” showing “add caller ”
2. Press “ ” key to choose “ delete caller”
3. Press “ ” to confirm, showing “ delete single” and “delete all”
4. Press “ ” to choose delete single or delete all
5. If choose “delete dingle” press “ ” to confirm, screen show 0000.
You can choose the number you want to delete and long press “ ” till

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screen show removed. It means you have been deleted this number.
6. If choose “delete all” pls long press “ ” till screen show removing all
and removed .it means you have been delete all number.
7. When all finished, press “ ” to exit the setting state.
3 Key function
4 Work mode (According to keys of button to choose what’s mode
need.)
1. Press “ ” key showing “add caller ”
2. Press “ ” key to choose “ word mode ”
3. Press “ ” to confirm, screen show “single key” and “mulit-key”
4. Choose the one you need and Press “ ” to confirm.
5. When all finished, press “ ” to exit the setting state.
5 Display Mode
1. Press “ ” key showing “add caller ”
2. Press “ ” key to choose “ display mode ”
3. Press “ ” to confirm, screen show “ live view” “queue view”
4. Choose the one you need Press “ ” to confirm. “live view” means,
when No.1 No.2 No.3 call in turn, screen is show 0003 0002 0001.
Newest call number show on the top
of screen. “queue view” means, when No.1 No.2 No.3 call in turn, screen
is show 0001 0002 0003. Oldest call number show on the top of screen.
5. When all finished, press “ ” to exit the setting state.
6 Prompt mode
1. Press “ ” key showing “add caller”
2. Press “ ” key to choose “prompt mode ”

3. Press “ ” to confirm, screen show “light vibration sound”
4. Choose the prompt mode you need and Press “ ” to confirm
6. When all finished, press “ ” to exit the setting state.
7 Prompt timing
1. Press “ ” key showing “add caller”
2. Press “ ” key to choose “prompt timing”. It can choose from 01-99
seconds.
3. Choose the time you need, and press “ ” to confirm.
4. When all finished, press “ ” to exit the setting state.
8 Remove timing
1. Press “ ” key showing “add caller”
2. Press “ ” key to choose “remove timing”
3. Press “ ” to confirm, can choose from 00-99. 00 means cycle
mode, all number will keep in screen, until cancelled by yourself. For
01-99 means, how long call number will disappear automatic.
4. Choose the number you need. Press “ ” key to confirm
5. When all finished, press “ ” to exit the setting state.
9 Cycle timing
1. Press “ ” key showing “add caller”
2. Press “ ” key to choose “cycle timing”
3. Press “ ” to confirm, can choose from 00-99. For example, if you
choose 10 seconds. It means each 10 seconds number will cycle one
time.
4. Choose the number you need. Press “Press “ ” key to confirm
5. When all finished, press “ ” to exit the setting state.
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VIII Packing List
1) Watch receiver 1pc
2) USB cable 1pc
3) User manual 1pc
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10 Date &Time
1. Press “ ” key showing “add caller”
2. Press “ ” key to choose “date & time”
3. Press “ ” to confirm. You will see current time (hours; minutes;
seconds and DD/MM/YY). “ ” they can adjust number. “ ” it can
let your choose from hours to minutes to seconds and to day to month to
year.
4. Choose the date & time you need and press “ ” to exit the setting
state. Then you will see screen show the time just now you choose.
11 keyboard set
12 Language
13 factory reset
1. Press “ ” key showing “add caller”
2. Press “ ” key to choose “factory reset”
3. Press “ ” to confirm, screen show confirm reset? yes/no
4. Choose Yes and Long Press “ ” to confirm till screen show factory
resetting.
5. When all finished, press “ ” to exit the setting state.

VII FAQ
WARNINGS
RF ENERGY EXPOSURE AND PRODUCT SAFETY GUIDE
This radio uses electromagnetic energy in the radio frequency (RF)
spectrum to provide communications between two or more users over a
distance. RF energy, which when used improperly, can cause biological
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Some call button
has less distance
Battery of call button
is close to empty
The watch receiver
cannot be charged
Call buttons cannot
be paired
The frequency is not
same or OSC resistor
is correct.
Change the correct
frequency and OSC
resistor.
LCD has no display
Check the bat voltage;
Check the screen cable
Charge the battery;
Change the screen cable
Change the battery
of call buttons
Check power adapter;
The battery is broken
Change power adapter;
Change the battery
Before using this radio, read this guide which contains
important operating instructions for safe usage and RF
energy awareness and control for compliance with
applicable standards and regulations.

damage.
All Retekess radios are designed, manufactured, and tested to ensure
they meet government-established RF exposure levels. In addition,
manufacturers also recommend specific operating instructions to users
of the radios. These instructions are important because they inform
users about RF energy exposure and provide simple procedures on how
to control it.
Please refer to the following websites for more information on what RF
energy exposure is and how to control your exposure to assure
compliance with established RF exposure limits: http://www.who.int/en/
Local Government Regulations
When radios are used as a consequence of employment, the Local
Government Regulations requires users to be fully aware of and able to
control their exposure to meet occupational requirements. Exposure
awareness can be facilitated by the use of a product label directing users
to specific user awareness information. Your Retekess radio has a RF
Exposure Product Label. Also, your Retekess user manual, or separate
safety booklet includes information and operating instructions required to
control your RF exposure and to satisfy compliance requirements.
Radio License (if appropriate)
Governments keep the radios in classification, business radios operate
on radio frequencies that are regulated by the local radio management
departments (FCC, ISED, OFCOM, ANFR, BFTK,Bundesnetzagentur...).
To transmit on these frequencies, you are required to have a license
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issued by them. The detailed classification and the use of your radios,
please contact the local government radio management departments.
Use of this radio outside the country where it was intended to be
distributed is subject to government regulations and may be prohibited.
Unauthorized modification and adjustment
Changes or modifications not expressly approved by the party responsi-
ble for compliance may void the user’s authority granted by the local
government radio management departments to operate this radio and
should not be made. To comply with the corresponding requirements,
transmitter adjustments should be made only by or under the supervision
of a person certified as technically qualified to perform
transmitter maintenance and repairs in the private land mobile and fixed
services as certified by an organization representative of the user of
those services. Replacement of any transmitter component (crystal,
semiconductor, etc.) not authorized by the local government radio
management departments equipment authorization for this radio could
violate the rules.
FCC Requirements
• This device complies with part 15 of the FCC Rules. Operation is
subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) this device must accept any interference received, including
interference that may cause undesired operation.
• This equipment has been tested and found to comply with the limits for
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a Class B digital device, pursuant to Part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference in a residential installation.
This equipment generates uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions, may
cause harmful interference to radio communications. However, there is
no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and on,
the user is encouraged to try to correct the interference by one or more
of the following measures:
-- Reorient or relocate the receiving antenna.
-- Increase the separation between the equipment and receiver.
-- Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.
-- Consult the dealer or an experienced radio/TV technician for help.
CE Requirements
• (Simple EU declaration of conformity) Henan Eshow Electronic Comm-
erce Co.,Ltd declares that the radio equipment type is in compliance
with the essential requirements and other relevant provisions of RED
Directive 2014/53/EU and the ROHS Directive 2011/65/EU and the
WEEE Directive 2012/19/EU; the full text of the EU declaration of
conformity is available at the following internet address:
www.retekess.com.
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• Disposal
The crossed-out wheeled-bin symbol on your product, literatu-
re, or packaging reminds you that in the European Union, all
electrical and electronic products, batteries, and accumulators
(rechargeable batteries) must be taken to designated collection
locations at the end of their working life. Do not dispose of these produ-
cts as unsorted municipal waste. Dispose of them according to the laws
in your area.
IC Requirements
Licence-exempt radio apparatus
This device contains licence-exempt transmitter(s)/receiver(s) that
comply with Innovation, Science and Economic Development Canada’s
licence-exempt RSS(s).
Operation is subject to the following two conditions:
(1) This device may not cause interference.
(2) This device must accept any interference, including interference that
may cause undesired operation of the device.
Le présent appareil est conforme aux CNR d’Industrie Canada
applicables aux appareils radio exempts de licence. L’exploitation est
autorisée aux deux conditions suivantes :
(1) l’appareil ne doit pas produire de brouillage;
(2) l’utilisateur de l’appareil doit accepter tout brouillage radioélectrique
subi, même si le brouillage est susceptible d’en compromettre le
fonctionnement.
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RF Exposure Information
• DO NOT operate the radio without a proper antenna attached, as this
may damage the radio and may also cause you to exceed RF exposure
limits. A proper antenna is the antenna supplied with this radio by the
manufacturer or an antenna specifically authorized by the manufacturer
for use with this radio, and the antenna gain shall not exceed the
specified gain by the manufacturer declared.
• DO NOT transmit for more than 50% of total radio use time, more than
50% of the time can cause RF exposure compliance requirements to
be exceeded.
• During transmissions, your radio generates RF energy that can possib-
ly cause interference with other devices or systems. To avoid such
interference, turn off the radio in areas where signs are posted to do so.
• The device complies with RF specifications when the device used at
5mm from your body. Third-party belt-clips, holsters, and similar
accessories used by this device should not contain any metallic compo-
nents. Body-worn accessories that do not meet these requirements
may not comply with RF exposure requirements and should be avoided.
• DO NOT operate the transmitter in areas that are sensitive to electrom-
agnetic radiation such as hospitals, aircraft, and blasting sites.
Avoid Choking Hazard
Small Parts. Not for children under 3 years.
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Protect your hearing
• Use the lowest volume necessary to do your job.
• Turn up the volume only if you are in noisy surroundings.
• Turn down the volume before adding headset or earpiece.
• Limit the amount of time you use headsets or earpieces at
high volume.
• When using the radio without a headset or earpiece, do not
place the radio's speaker directly against your ear
• Use careful with the earphone maybe possible excessive
sound pressure from earphones and headphones
can cause hearing loss
Note: Exposure to loud noises from any source for extended
periods of time may temporarily or permanently affect your
hearing. The louder the radio's volume, the less time is
required before your hearing could be affected. Hearing
damage from loud noise is sometimes undetectable at first
and can have a cumulative effect.
Avoid Burns
Antennas
• Do not use any portable radio that has a damaged antenna.
If a damaged antenna comes into contact with the skin
when the radio is in use, a minor burn can result.
Batteries (If appropriate)
• When the conductive material such as jewelry, keys or
chains touch exposed terminals of the batteries, may
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WARNING
WARNING

complete an electrical circuit (short circuit the battery) and
become hot to cause bodily injury such as burns. Exercise
care in handling any battery, particularly when placing it
inside a pocket, purse or other container with metal objects.
Long transmission
• When the transceiver is used for long transmissions, the
radiator and chassis will become hot.
Safety Operation
Forbid
• Do not use charger outdoors or in moist environments, use
only in dry locations/conditions.
• Do not disassemble the charger, that may result in risk of
electrical shock or fire.
• Do not operate the charger if it has been broken or damag-
ed in any way.
• Do not place a portable radio in the area over an air bag or
in the air bag deployment area. The radio may be propelled
with great force and cause serious injury to occupants of
the vehicle when the air bag inflates.
To reduce risk
• Pull by the plug rather than the cord when disconnecting
the charger.
• Unplug the charger from the AC outlet before attempting
any maintenance or cleaning.
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WARNING

• Contact Retekess for assistance regarding repairs and
service.
• The adapter shall be installed near the equipment and shall
be easily accessible
• Risk of explosion if battery is replaced by an incorrect type.
Dispose of used batteries according to the instructions.
• Adapter shall be installed near the equipment and shall be
easily accessible.
• The plug considered as disconnect device of adapter.
• The operating temperature of the EUT can’t exceed the
specified range.
Approved Accessories
• This radio meets the RF exposure guidelines when used
with the Retekess accessories supplied or designated for
the product. Use of other accessories may not ensure
compliance with the RF exposure guidelines and may
violate regulations.
• For a list of Retekess-approved accessories for your radio
model, visit the following website: http://www.Retekess.com
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EU Importer：
Name：Germany Retevis Technology GmbH
Address：Uetzenacker 29,38176 wendeburg
WARNING

Cut along this line
Warranty Card
Product model: Date of purchase:
Serial Number:
Seller: contact number:
contact number:
Zip code：
Username:
Address:
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.

MADE IN CHINA
Henan Eshow Electronic Commerce Co., Ltd
Add: 7/F, Sanjiang Building, No.170 Nanyang Road, Huiji District,
Zhengzhou, Henan, China
Facebook：facebook.com/RetekessWirelessSystem
E-mail: [email protected]
Web: www.retekess.com