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1  I am considering ordering a 10 pack of these walkie talkies. Is there any issues with using these in Canada?
No issues . We've sent radios to your country . We have FCC and CE certification .
2  Hello, I just bought the H-777 Pack. Unfortunatelly, there is no User-Manual in my language. Can you please send the Link for the German Usermanual in PDF? -> Thanks I already read the english user manual. I tried to activate the VOX-Functionality as described: I pressed the PTT-Button and the one below (monitor). I kept both on hold. Afterwards I turned the radio on, while beeing on channel 1. The radio just turns on. There is no note that VOX is beeing activated or anything else. Can you tell me how to turn it on? Best regards
3  earpiece will not work in mic.....still hear sound with earpiece plugged in
What earpiece you use ? Here is a great one -- http://www.retevis.com/ptt-vox-covert-acoustic-tube-earpiece-for-2-pin-kenwood-retevis-radio
4  I bought some back up batteries about 8 months ago and wondered if I can save them until needed or should I charge them and put them into a rotation ?
After charging them full ,keep them to somewhere dry .
5  How do I program my new H-777 walkie talkie and is it necessary to do so? The squelch volume is too loud when interference is taking place. How do I adjust the volume?
You need to connect your radio to PC by cable , How to program it on software please read the guide here : http://blog.retevis.com/retevis-radio-frequency-programming/ . Then when you open the software , you will see just like the picture below -- There you could find the squelch levels , that's the function you need to set .And please note --
1. The higher the number is , and the stronger the ability of noise suppression is . But meanwhile it has less probability to receive the weak signal.
2. Conversely, The smaller the number is , the weaker the ability of noise suppression is , But meanwhile it is more easily to receive the weak signal.
3. A "0" level indicates that there is no squelch suppression function, which is the lowest level.
6  I recently purchased a Retevis 2 Pin PTT Mic Covert Acoustic Tube In-ear Air Acoustic Earpiece Headset off Amazon for work (were use Retevis H777 radios) but when I tried it, my audio can BARELY be heard. The sound can be heard up to the point until it connects to the acoustic tube, at which point I can hear hardly anything. I really like the style and comfort of this earpiece. What could be the problem?
This is may be the quality problems , please send mails to your Amazon sellers to ask for your warranty .
7  Can I purchase a replacement antennae? If so, what is the procedure? Diane Raphael
Here to get one --- http://www.retevis.com/sma-f-uhf400-470mhz-radio-antenna-for-retevis-h777
8  Hi, the Collision Department bought a pack of 15 radios a few weeks ago. Today our Service Department purchased 10. The result is we have 2 departments running into each other as all 25 radios are on the same frequencies. Can we program the 10 so that each department keeps separate?
Sure you can . Here is a blog telling you how to operate it : http://blog.retevis.com/retevis-radio-frequency-programming/
9  what parameters to expose in 777 for communication with 628. I have adjusted channels 1 446.00625 2 446.01875 3 446.03125 4 446.04375 5 446.05625 6 446.06875 7 446.08125 8 446.09375 The radio set 777 hears 628. but 628 doesn't hear 777. what else should be adjusted?
Please have a check about H777's CTCSS/DCS .Try to not set them .
10  Can not get H 777 software to install on system. windows 10
I'm sorry but could you try it on win8 please ?