TDA7492 4.0 2*50W 2-channel Power Amplifier Board Wireless Bluetooth Audio Receiver Stereo Digital Amplifier ModuleIt's designed to optimize the circuit layout. Sound quality is very good and it can drive 4/6/8/16 ohm speakers. Bluetooth V4.0, it has sufficient power output 2*50W.Features:Sound quality is very good by using this module.Using CSR8635 Bluetooth chip, Bluetooth V4.0, high software compatibility.Power amplifier chip: TDA7492 double channels sufficient power 50W, better than TDA7492P.With microphone (can call with Bluetooth), AUX interface(wired mode audio input).With 5 buttons for adjustment, convenient and easy operation.Applicable speaker impedance: 4/6/8/16 ohm (8 ohm is the best).Specifications:Supply Voltage: DC 10-25VPower Interface: 2.1 DC SocketAudio Input: Bluetooth Receiver V4.0Amplifier Chip: TDA7492Output Power: 2*50WApplicable Speaker Impedance: 4/6/8/16 ohmNumber of Channels: Two-channel StereoPCB Board Size: 81 * 58mm / 3.2 * 2.3inWeight: 47gPackage List:1 * Bluetooth 4.0 Audio Receiver Power Amplifier Board