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The importance is: first, to ensure the safety of yourself and the team; second, the team is notified to give up the original plan to save people as the only goal; third, establish contact with the outside world, forward the help signal The communication bridge with the outside world; fourth, rescue......

First remove the machine, disassemble all external parts one by one (such as keys, PTT glue, light guide columns, etc.), carefully clean the line board with water -free alcohol or special laundering water The stains on the board; then soak it with waterless wine. If you have the conditions, you can ......

Infertile or improper use will cause bad LCD or poor contact rubber contact (sending maintenance stations).

If there is a problem with the intercom, first check whether the battery is electric and the battery is okay, it may be the following reasons: 1. The emission key (PTT key) is aging or damaged outside the rubber; 2. Poor contact with the microphone sockets; 3. Software circuit plugs are not in to......

Please change the CTCSS/DCS settings of all the intercom on this unit.

First confirm that the frequency you use is the same as that of the CTCSS/DCD settings as other members in the group; if there is no problem, please confirm whether you are within the effective range of other walkiers.