Speaker, Audio manufacturer / supplier in China, offering 2 Channels 60W Blue-Tooth Audio Amplifier with Subwoofer out for Smart Home Audio, Home Stereo Sound System WiFi Blue-Tooth 2*60W Audio Amplifier with USB, HD-Mi, Optical and Aux in, 1.8 LCD Display Screen Smart Audio 4 Channel 25W Blue-Tooth Wall Amplifier with Aux in and out and so on.