Retevis RT75 User manual
User’s manual
0.5Watts Handheld walkie-talkie
Model US:RT75
EU:RT675
EN- Instruction for use
This set includes 2 walkie-talkie units, these are communication devices which operate on
mobile radio frequencies, They come with 16/22 (option) channels as well as a back-lit LCD
screen, enabling you to communicate over several kilometers free-of-charge( up to 2 km in
open areas)
Note: Please read these user instructions carefully before using the equipment and retain
for future consultation.
Specific Recommendations:
If you carry any kind of personal medical device, consult a doctor before use.
To avoid the risk of burns, do not use the device if the aerial is damaged in any way.
Don’t use the device in a potentially explosive setting (e.g. Around petrol pumps, on the
lower deck of a boat or around a fuel-storage installation or chemical products)
If travelling in a car or by bike, stop before using the device,
Switch off the device if on an airplane or in a hospital.
Never use the device in close proximity to a radio to avoid interference.
Remove the batteries if the device is not use for an extended period of time, Never mix
used with new batteries.
Position the transmitter and antenna at least 5cm from your face. Direct the antenna
upwards and speak normally.
Clean the device with a damp cloth. Avoid the use of cleaning agents and solvents.
Don’t modify the device in any way. In the event of damage occurring, ensuring that
the device is checked by a qualified professional.
The device cannot be used to contact the emergency services.
01
PIC 01
02
Up Button
Down Button
Before Use the device
Remove the belt clip
Before insert batteries into the device, first pull the belt clip latch away from the
device(See PIC02)
Installing the batteries
1.Slid down the battery compartment cover( See pic03).
2.Insert 3*AAA batteries(Not included)
3.Position the batteries according to polarity making on the battery compartment.
4.After placing batteries into correct positions, replace the battery cover( See PIC04)
PIC 04
PIC 03PIC 02
03
Using the device
1.Turning the device on/off:
Switch on the device: press and hold on the on/off button for 3 seconds, then you will
hear a beep sound.
Switch of the device: press and hold on the on/off button for 3 seconds, then you will
hear a beep sound.
2. Adjusting the volume:
To increase the volume, press the Up button and press the Down button to decrease
volume.
Note: The volume level is displayed on the screen.
3. Low Battery Indication.
The battery voltage level is indicated by the numbers of squares present inside the battery
icon on the LCD Screen.
Battery Full
Battery 2/3 charged
Battery 1/3 charged
Battery empty
When the battery voltage is low, the battery icon will flash and a beep will be heard to
indicate that the batteries need to be replaced or recharged.
4. Receiving / transmitting communications:
The devices are in ‘Reception’ mode when it is turned ON and no transmitting, when a
signal is received on the current channel, the LCD will display in reception.
When you press the PTT(push to talk) button, the devices switches to“Transmission”mode.
Hold the device in a vertical position with the Mic(microphone) 5-10cm away from your
mouth. While holding the PTT button, speak into the microphone in a normal tone of voice.
Release the PTT button when you have finished transmitting.
For others to receive your transmission, they must be on the same channel with you.
04
Note:
1.The maximum talking range is 2km, it will depended on your surroundings and
environment. It will be affected by obstructions such as hills or buildings.
2.Don
’
t try to use two devices which are less than 1.5mm(5 feets) apart, otherwise, you
may experience interference.
5. Changing Channels:
Press the MENU button one time, The channel number will flash on the display.
Press the up / down button to change the channel,
Press the PTT button to confirm and return to stand-by mode.
Note: If no button is pressed within 15 seconds during setting, the device will return to
stand-by mode.
6. CTCSS( Continues Tone Coded Squelch System)
Press the MENU button twice, the current CTCSS code will flash on the display,
Press the up / down button to change the 61 available codes.
Press the PTT button to confirm and return to stand-by mode.
License free radio
’
s operating on the FRS/PMR446 frequency band , the device has
16/22 available radio channels, If there are many device users near you, there is a
chance that some of the users are operating on the same radio channel.
To prevent that you receive signals from other users, sub-channels have been integrated.
When using CTCSS, a low frequency tone (between 67-250 HZ) will be transmitted along
with the voice signal, There are 99 available tones to choose from,
You are free to choose one of the 99 available sub-channels, Due to filtering, these sub-
channels will generally not be audible so they will not disturb the communication.
05
7. VOX (Hands free function)
Press the MENU button three times, the current VOX setting will flash on the display and
the VOX icon will display.
Press up button to set the VOX sensitivity level between 1 and 3 level( level 3 is the
high sensitive level).
Press down button until “OF” appears on the display to turn VOX OFF.
Press the PTT button to confirm and return to stand-by mode.
In VOX mode, the radio will transmit a signal when it is activated by your voice or other
sound around you.
VOX operation is not recommended if you plan to use your device in a noisy or windy
environment.
Note: VOX mode will be over ride when you press the PTT button
8. Scanning for an active radio channel
Press and hold the UP button 2 seconds: the “SCAN” function indicator will appear
on the display and the channel will scan continuously from 1 to 16/22. once an active
channel is found, the scanning will stop and you can listen to the transmission.
When the transmission is on the found channel stop, the scanning will resume automatically.
Note: If you press PTT button while listening to a found channel, the device will go back to
stand-by mode on the found channel.
9. Monitor
Press and hold the DOWN button about 3 seconds to active monitor.
Release the DOWN button return to stand by mode.
10. Setting the call Tone
The device has 10 call tones
Press the MENU-button 4 times, “CA” is displayed and on the current call tone.
Press the UP / Down button to change another Call Tone.
Press the PTT button to confirm and return to stand-by Mode.
06
11, Sending a call Tone.
Press the CALL button one time quickly, the call tone will be transmitted on the setting
channel.
12. Roger Beep On/Off
After the PTT button is released, the device will send out a roger beep to confirm that have
stopped talking.
Press the MENU button 5 times, “Ro” will be displayed.
Press the UP /Down button disable the roger beep ON/OFF.
Press the PTT button to confirm your selection and return to the stand-by mode.
13. Backlit Display.
Press any button except for the MENU button to activate the back light of the LCD display,
The back light will light on about 5 seconds.
14. Headset connection,
The device can be used with headset (If there is headset packed together with the device)
The connector is located on the top of the device.
Insert the earpiece plug into the connector (2.5mm jack)
There is a small “PTT” button on the earpiece has the same function as the PTT button on
the device.
When you use the PTT button from the earpiece, you must also use the microphone from t
he earpiece to talk.
Note: Don’t connect other headset, it may damage your device.
07
15. Battery saving function:
When the device has not been used for 6 seconds, the economy mode is automatically
activated, This does not affect the reception of transmission and the stand by mode is
automatically re-activated as soon as signal is detected.
16. Buit-in Flash light
Your device has a built-in flash light that can be used in sending light signals or for our
lighting needs.
17. Lock & Unlock the device
Press and hold MENU-button for 3 seconds to lock the device. The button lock icon is
displayed on the LCD screen.
Press and hold MENU button for 3 seconds to unlock the device.
18. Technical specifications
Frequency US:FRS，EU:PMR446，CA:FRS&GMRS
Channels EU:16 channels , US(CA):22 channels
Sub-code CTCSS 61
Transmission Power =<500mW ERP
Range Up to 2 Km(Open field)
Battery type 3xAAA Alkaline/rechargeable batteries(Not included)
Modulation Type FM – F3E
Channel spacing 12.5kHz(Narrow band)
08
Frequency
CH FrequencyCH
1 462.5625
2 462.5875
3 462.6125
4 462.6375
5 462.6625
6 462.6875
7 462.7125
8 467.5625
9 467.5875
10 467.6125
11 467.6375
12 467.6625
13 467.6875
14 467.7125
15 462.5500
16 462.5750
1 446.00625
2 446.01875
3 446.03125
4 446.04375
5 446.05625
6 446.06875
7 446.08125
8 446.09375
9 446.10625
10 446.11875
11 446.13125
12 446.14375
13 446.15625
14 446.16875
15 446.18125
16 446.19375
17 462.6000
18 462.6250
19 462.6500
20 462.6750
21 462.7000
22 462.7250
US（
FrequencyZGHRK
EU（
FrequencyZGHRK
09
This manual suits for next models
1
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