Features: brand new and high quality Made of black immersion gold circuit board, imported speaker capacitor, large-capacity filter capacitor for channels. The digital amplifier module is with high efficiency of over 90%, general distortion noise is less than 10%, low quiescent current and noise suppression. Designed with input reverse connection protections, short circuit protections, over heat protections. Digital power amplifier board is widely applicable to LCD TVs, Mutimedia speaker,etc. Low-price.but with high-power and good sound quality output. Specifications: Supply voltage: DC5V Input method: single-ended Output power: 5W 2 5V /3W4 5V /1.8W 8 5V Size:Approx.55.12x32.26mm/2.17x1.27inches Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Power Amplifier Board