Speaker, Audio manufacturer / supplier in China, offering 4 Channel 25W Blue-Tooth Wall Amplifier with USB/ SD Card/ FM/ RS 485 for Home Hotel Room Bgm, 2 Channel 25W Blue-Tooth Wall Amplifier with 2 Zones Volume Control for Smart Home Audio, 2 Channels 60W Blue-Tooth Audio Amplifier with Subwoofer out for Smart Home Audio and so on.