Home User Tutorial RETEVIS H777 Radio FAQ


by retevis
  • Question 1: Why the radio can receive but couldn’t transmit signal?
  • Answer:
  • 1: Make sure the 2 radio are the the same frequency and channel
  • 2: The difference between CTCSS and DCS,you need to program them to the same
  • 3: Lower battery: Please fully charged before use them
  • 4: Press PTT and confirm if the indicator light is red,if not,there is a problem with the PTT
  • Question 2: Why the radio can transmit but couldn’t receive signal?
  • Answer:
  • 1:May it because of in the same frequency the CTCSS is different.Please confirm if it is the same by programming the radio.
  • 2: Turn up the voice
  • 3: Lower battery:Please fully charged before use them
  • Question 3: Why the radio keep saying “Please change battery”?
  • Answer:
  • 1: There is a problem with the battery,please change other battery to have a try
  • 2: There is a problem with the battery connector:Please check if the radio body and the battery connected tightly
  • 3:If the above solution still didn’t work,please contact with the seller for help
  • Question 4: Why receiving signal is noisy?
  • Answer:
  • 1:Because of the signal interference:Please go to open area to have a try.And also,please change the CTCSS and DCS by programming the radio
  • 2:Squelch level is too low:Please turn up the Squelch level by programming the radio
  • 3: Forgot to install the antenna
  • 4:May there is a problem with the radio speaker,please use the earpiece to try.
  • Question 5: Can this radio work with other brand radio?
  • Answer:
  • If their frequency is with 400-470 MHz ,please program them to the same frequency and same CTCSS/DCS.They can communicate each other
  • Question 6: Why the radio channel is noisy and change it by itself?
  • Answer:
  • 1: May the channel is empty frequency, please write the frequency by programming
  • 2: May you open the VOX function, please turn off this function
  • Question 7: How to improve the radio distance ?
  • Answer:
  • 1:Choose the high power by programming radio
  • 2:Choose the high gain antenna
  • 3: Fully charged before use the radio
  • 4:The distance depends on the environment.If you use it in open area,it will be further.
  • Question 8: Do I need to program the radio before use it?
  • Answer:
  • If you need,you can program.However,if you don’t need.Just open the box and make sure they are in the same channel.


Switch between Chinese and English:    Stay Channel 15, to press PTT and MONITOR

Voice function turn ON or OFF:                  Stay Channel 10, to press PTT and MONITOR

Scan function turn ON or OFF:                   Stay Channel 16, to press PTT and MONITOR


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Leave a Comment


Jim Ogren 28/12/2015 - 19:23

H777 VOX does not activate. I have special head sets with voice mic but two different identification numbers; X000NLQCNL and LPN RR 064286939. Should they work with each other? I tried to activate VOX by manual instructions but did not work. If I need to program, how do I obtain the software and cables?

Nina 05/01/2016 - 03:25

pls log in http://www.retevis.com/programming_software to download software:
“NEW USB DRIVER” and “H-777 & H777”
Here’s the programming cable:

More details, pls check http://www.retevis.com/blog/how-to-use-vox-function-retevis-h777/

Matt 12/01/2016 - 20:24

I purchased radio specifically for the VOX capabilities, however doesn’t appear that with current out of box headset is possible? What do I need? Software? if i do need software then I guess also will need the USB cable? do i need a different mic?

Brenan 28/01/2016 - 01:05

How do I program the walkie to scan all channels? I want my walkie to scan all channels, but the other ones to have a dedicated channel.

Russell 14/04/2016 - 05:55

VOX does not work on my h777 I have activated using the software and still nothing, I recently purchased 4 of these and none of these work. Is this something I am doing wrong surely all 4 cannot be faulty? also I saw a blog that states some early “M labeled” radio do not work, can you provide 2 images to compare the ones that do to the ones that don’t please.


Amanda 14/04/2016 - 08:34

Hello,can u give us your radio label so that we can solve your problem ,thanks!

Cyber 02/07/2016 - 23:14

When I try to download the software, fisrt it shows a google Icon and comes up with the following message

D:\Retevis Porgramming software\H-777-RT7 Programming software.rar

X D:\Retevis Porgramming software\H-777-RT7 Programming software.rar

Class not registered

Zoe Chen 06/07/2016 - 08:40

“rar” is a compression file, please note you need “un-compress” it first before “setup”.

Steve 04/11/2016 - 08:40

I have 3 out of ten radios that will not take the different channels i am trying to put into them. They work ok with the factory channels. Any ideas?

Zoe Chen 08/11/2016 - 09:30

You mean you have trouble with programming the frequencies ?

Michele 20/05/2017 - 05:02

Hi, it seems that is no difference beetwin hi power and low power about transmission. Which are the different power?

Elsa 25/05/2017 - 18:01

hello, H777 actual power is around 3W, as H7777 is not a high power radio, so it’s high power and lower is no obvious step difference. Thanks.

Michele 26/05/2017 - 03:41

Thank you Elsa, very kind

Mary 06/08/2020 - 04:23

My batterie on my h777 will not charge.
The battery charger does not light up.

James 06/08/2020 - 08:54

Hello! sorry for the delay.
1. check if the charger is properly connected and not loose
2. Do you have any other chargers? Try to charge.
3. Can the walkie-talkie be used normally after charging?
4. The charger is broken

Bruce Paul 12/01/2021 - 05:26

I have six H-777 devices with mic/phones. The VOX function is not working. These units are a couple of years old. I have carefully followed the instructions and VOX is not work.

Please send me instruction on how to get this feature working.

Thanks, Bruce

Cherry 12/01/2021 - 17:06

Hi,as i Know, now the H777 don’t have the VOX function.
Here we suggest you contact with your seller to check it.


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