2. err is an error code, which means that a fault or error occurs.
There may be a problem with the device itself, or there may be a problem with the connection to another device.
Requires further investigation and repair.
3. If you encounter err error codes, check whether the device works properly, whether there is a power supply, and whether it is properly connected to other devices.
If the problem cannot be solved, you can contact the manufacturer or professional technicians for repair.
At the same time, it is also necessary to pay attention to the maintenance and maintenance of the equipment to avoid failure.
Fault cause (1) The distance between the microphone and the receiver is relatively far.
(2) There is other radio wave interference around.
(3) The problem of the microphone or receiver itself can be tried by substitution method.
(4) Not applicable to this occasion.