WIRELESS MICROPHONE HAVING HAD STRUCTURE TO CUT OFF BATTERY SUPPLY AUTOMATICALLY IF WE GOT OUT OF RANGE AND GENERATE NEW ID AUTOMATICALLY

摘要

A wireless microphone is provided to remove the necessity for a user to re-set the ID of a microphone with his/her hands when replacing the microphone or main board. In a classroom A, when the power source of a microphone A(100) is turned on, a receiver A(200) closest to the microphone A communicates through the initially set default-ID, and is reset as the new ID which is automatically created in the microphone A to perform communication through the new ID until the power source of the microphone A is turned off. If a user does not turn off the microphone A and moves to a classroom C, the microphone A deviates from the wireless communication radius between the microphone A and a receiver A. In case a predetermined time elapses, the power source of the microphone A is turned automatically off.