KKmoon TDA7492 Wireless Bluetooth 4.0 2*50W 2-channel Audio Receiver Stereo Digital Power Amplifier Board Module Sound quality is very good by using this module. Using CSR8635 BT chip, BT V4.0, high software compatibility. Power amplifier chip: TDA7492 double channels sufficient power 50W, better than TDA7492P. With microphone (can call with BT, AUX interface(wired mode audio input). With 5 buttons for adjustment, convenient and easy operation.