Working mode: Class D (PWM modulation type) Chip selection: PAM8610 Power supply range: DC6V-15V (Nature Protection) (Recommended power: DC 12V2A) Dimensions: 25 * 31 * 2.5mm Channel Type: Dual Channel Output power: 10W * 2 (8R load) / 15W * 2 (4R load) (Recommended speaker: 10-30W) Frequency response: 20HZ-15KHZ Quiescent current: 20mA (DC12V) SNR: 90% Input impedance: 15K Output impedance: 4-8R Harmonic Distortion: <0.1% Size:28x22x2.5mm Speakers:10-100W