Features 1、A new efficient digital amplifier, input DC6-15V, receive 15Wx2 power. 2、This class D amplifier board adopts high performance PAM8610 amplification chip, with loud and clear sound quality. 3、Dual channel stereo brings you superior auditory enjoyment. 4、Reasonable circuit layout, compact size, easy to install. 5、Ideal for making MP3 / MP4, mobile phone, notebook, etc. Specification Item Type: Amplifier Board Operation Mode: D class (PWM modulation) Chip Model: PAM8610 Cooling volume: No need to heat Channel Type: Dual Channel SNR: 90% Frequency Response: 20Hz-15KHz Static Current: 20mA Onput Impedance: 4-8Ω Harmonic Distortion: <0.1% Output Power: 10W+10W(8Ω speaker box); 15W+15W(4Ω speaker box) Size: 45x48x18mm / 1.77x1.89x0.71in (exclude protruding part of the potentiometer) Package List 1 x Amplifier Board 1 x Washer 1 x Nut 1 x Knob Cap