- This is TDA7297 power amplifier module, which has binding posts; - 2.0 dual channel (15W + 15W), can be connected to 4~8ohm 10~50W speakers; - Compact size with loud sound; - Voltage: 9~15V; Suggest use the voltage and current higher than DC 12V/2A; - Power: 15W + 15W; - Output impedance: 4~8 ohm; - Peak power: 30W + 30W; - Notes: If you use the battery with the voltage / current more than DC 12V/2A, or transformer with the voltage / power more than 12V / 30W, then it will be noiseless; If you use switching power supply or other variable power sources, it will have a little noise.