Patent ID: 10064189

Abstract:
To prevent occurring of cut of communication.An AV center 2 includes a wireless communication section 22, a power supply section 25 that is for supplying power supply voltage to respective sections, and a microcomputer 21. A wireless speaker 3 includes a wireless communication section 32, a power supply section 35 that is for supplying power supply voltage to respective sections, and a microcomputer 31. The microcomputers 21 and 31 supply power supply voltage to the wireless communication sections 22 and 32 by the power supply sections 25 and 35 when the microcomputer 21 of the AV center 2 receives setting of power OFF of an audio playback system 1. And, the microcomputers 21 and 31 perform wireless communication and monitor a channel of the DFS band by the wireless communication sections 22 and 32.