Tda2030 One-channel Mono 15w Ac / Dc 12v for Audio Amplifier Board Pack of 1 OutputPower: 10-15W, Frequency Range: 20Hz-20KHz Scope: Input AC/DC 9-15V Voltage , Current:&gt; 1A (Or &gt;15W),Distortion: &lt;0.1% at 1W Signal To Noise Ratio: &gt;70dB ,Isolation: &gt;50dB, Net weight: 38g Suggest:Horn selected: 2.5-4 ", 5-20W, Impedance 4-8 Europe Full Frequency Loudspeaker Finished Plate: 60*47*32mm(L*W*H)(Include The Radiator,But Not containing potentiometer handle specifications)