ITEM NAME:Mini Hi-Fi Audio Stereo Amplifier 2x10W PAM8610 Dual Channel D Class Module A9J4 Mini Hi-Fi Audio Stereo Amplifier 2x10W PAM8610 Dual Channel D Class Module A9J4 Rated output power: 10w + 10w (8Ω) Frequency response: 20Hz to 50KHz Operating voltage: DC 7.5-15V PCB board size: 40 * 40 * 20 mm Color: As shown Work: D Class Quiescent Current: 20mA Efficiency: 90% Recommended supply voltage: 12V, the center pin of 12V DC is + package includes: 1 x Amplifier board Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/-1-3cm.