ITEM NAME:1X(Tda7492P Bluetooth Receiver Amplifier Audio Board 25Wx25W Speakers ModifF6D1) 1X(Tda7492P Bluetooth Receiver Amplifier Audio Board 25Wx25W Speakers ModifF6D1) 1X(Power:2.1 Interface DC 10-25V power supply (with reverse power protection),Audio input:Bluetooth receiver Output Impedance:8 ohms Best (can drive 4,6,8,16ohm impedance speakers) Amplifier chip:TDA7492P (with the letter P is a Dual-channel 25-watt 25W + 25W ) Output power:2 * 25W Additional features:AUX audio input interface (Wire mode audio input) color:blue Material:metal + PC Package Contents: 1*Bluetooth Receiver Amplifier Audio Board)