Please change the sub-tone signal tone. At the same time, you must change the signal tone of all walkie-talkies in the group, or apply to change the frequency.
First confirm whether the frequency and sub-audio signals you use are the same as those of other members in the group; if there is no problem, please confirm whether the other members in the group are in the service area.
After the machine enters the water, the battery should be unplugged immediately, the water should be thrown out vigorously, dried in a ventilated and dry place, and sent to the maintenance station for repair in the shortest time.
Check if the small hole in the microphone MIC sending port is blocked and the volume switch is turned on to a larger position.
Check if the radio battery contacts are deformed and the power switch is loose.
Check if the PTT button is stuck. There should be a slight "click" sound when you press the PTT.
Service Hotline: 020-83065895