Power supply requirements: default 220V (can also be set to 110V) Maximum output power: 1000W 4 ohms peak, 500W 8 ohms peak Channel: Mono Signal to noise ratio: ≤ 105DB Distortion THD: < 0.01%, Frequency response: 20Hz-30KHz, Magnification factor: about 30x, Input impedance: 47K Product Name: YD1000W Mono Digital Amplifier Board Power supply requirements: default 220V (can also be set to 110V) Maximum output power: 1000W 4 ohms peak, 500W 8 ohms peak Channel: Mono Signal to noise ratio: ≤ 105DB Distortion THD: < 0.01% Frequency response: 20Hz-30KHz Magnification factor: about 30x Input impedance: 47K Color: Black Material: Metal Package Contents: 1* 1000W Power Amplifier Only the above package content, other products are not included. Note: Light reflection 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.