ITEM NAME:TDA2030A Mono 15W Audio Power Amplifier Board AC/DC 12V Assembled MO Description: 100% Brand New and High Quality Performance parameters Output Impedance: 4-16ohm Output Power: 15W Voltage: AC 6-18V, DC 12V (> 1A) Speaker recommendation: 2.5-4 inch 5-20W (4-8ohm) Transformers Recommended: AC 12V 15W> 1A Board size: 55 * 55mm Heat sink size: 55 * 20 * 25mm Frequency range: 20hz-20khz SNR:> 70dB Isolation:> 50dB Distortion: <0.1% at 1W package included: 1x Assemble amplifier board.Output Power: 15W. 1x Assemble amplifier board. Board size: 55 55mm. Isolation:> 50dB. SNR:> 70dB. Frequency range: 20hz-20khz. Heat sink size: 55 20 25mm.