Features: 100% Brand new and high quality!! Digital PAM8610 2*15W Dual Channel Stereo Class Amplifier Board 12V Specifications: Supply voltage: DC 7V-15V Output power: 10w + 10w (8 load) Efficiency: 90% Shutdown Current: 4uA Quiescent current; 20mA SNR: 86% Total harmonic distortion: 5W / 1KHz / 8 ---- 0.1% Frequency range: 20Hz-20KHz Input impedance: 15K Output Impedance: 4-8 Amplifier board size: 29mm * 25mm Color: Black How to use: 1. The power supply voltage limit is 16.5V do not use more than this voltage. 2. The power supply is recommended for 12v 3A power supply filter better 3. 4-8 inch stereo speakers recommended. 4. Do not short-circuit the audio output to each other or shorted to ground. 5. Carefully check before electricity ensure wiring is correct before electricity. Package Includes: 1 * Digital PAM8610 Amplifier Board