Baitaihem 2.1 Channel Audio Amp Class D 2x50W+100W Subwoofer Home HiFi Amplifier With Bluetooth 4.0 Input This amp adopt original TPA3116 chip and latest blue tooth 4.0 version Input mode:Bluetooth input and analog input HiFi AccessoriesHigh-fidelity Sound. With Subwoofer Output and Treble / Bass adjustment.Rated output power: 2*50W+100W Come with DC 24V 4A Power Supply