ITEM NAME:PAM8610 Dual Channel DC 12V HD Pure Digital Audio Stereo Amplifier Board Cl A2V9 PAM8610 Dual Channel DC 12V HD Pure Digital Audio Stereo Amplifier Board Cl A2V9 Class D Quiescent current: 20 mA Operating voltage: DC7.5-15V Nominal output power: 10 w + 10 w (8) Frequency response: 20 hz to 50 khz Recommended voltage: 12 v In the center is + 12VDC PINO. colour:Black Material:metal + PC Package Contents: 1*Audio Amplifier Board.1 Audio Amplifier Board. In the center is + 12VDC PINO. Nominal output power: 10 w + 10 w (8).