Specification: _x005f_x000D_ Origin: Mainland China _x005f_x000D_ Type: Module _x005f_x000D_ Condition: New _x005f_x000D_ Supply Voltage: 7V-15V V _x005f_x000D_ Model Number: Digital Stereo Amplifier Board _x005f_x000D_ Power supply voltage: DC 7V-15V _x005f_x000D_ Output power: 15w+15w (8 loads) _x005f_x000D_ Efficiency: 90% _x005f_x000D_ Shutdown current: 4uA _x005f_x000D_ Quiescent current; 20mA _x005f_x000D_ Signal-to-noise ratio: 86% _x005f_x000D_ Total harmonic distortion: 5W / 1KHz / 8 ---- 0.1% _x005f_x000D_ Frequency range: 20Hz-20KHz _x005f_x000D_ Input impedance: 15K _x005f_x000D_ Output impedance: 4-8 _x005f_x000D_ Power amplifier board size: 30mmx25mmx2.5mm/1.18x0.98x0.1inch _x005f_x000D_ _x005f_x000D_ how to use: _x005f_x000D_ 1. The power supply voltage is limited to 16.5V, please do not exceed this voltage. _x005f_x000D_ 2. Recommended power supply is 12v, 3A power supply filter is better _x005f_x000D_ 3. 4-8 inch stereo speakers are recommended. _x005f_x000D_ 4. Do not short the audio outputs to each other or to ground. _x005f_x000D_ 5. Check carefully before power on to ensure that the wiring is correct before power on _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Note: _x005f_x000D_ Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! _x005f_x000D_ Please allow 1-2cm measuring deviation due to manual measurement. _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Included: _x005f_x000D_ 1 x Digital Amplifier Board