Top-cofrLD 2 Channel 2.0 15W+15W TDA2030A Hifi Stereo Amplifier AMP Board DIY Kit Operating voltage: AC 12V 2A Requirements of 15W-20w Output Impedance :4-8 ohms, speaker can drive around 15w-45w Maximum output power: left and right channel 15Wx2 Hifi stereo amplifier Kindly Note:This is a kit you need to solder it by yourself (It is very easy and funny,you will enjoy the DIY )