Features: This component is 100% brand new. Can effectively amplify the power, give the machine a greater impedance, so that the machine has a higher level of performance. Because this chip is a digital chip, its efficiency can reach over 90%, so it has the advantages of high power and low heat. It is recommended to use a power supply for the 12V, 3A power supply filter. Made of high quality materials, stable and durable. Specification: Power supply voltage: DC 7V-15V Output power: 10W + 10W (8 loads) Efficiency: 90% Shutdown current: 4uA Quiescent current: 20mA Signal to noise ratio: 86% Total harmonic distortion: 5W/1kHz/8--0.1% Frequency range: 20Hz-20kHz Input impedance: 15K Output impedance: 4-8 Amplifier board size: Approx. 30 * 25 * 2.5mm / 1.18 * 0.98 * 0.1inch Package list: 1 * Power Amplifier Board How To Use: 1. The power supply voltage is limited to 16.5 volts. Do not use a power supply that exceeds this voltage. 2. It is recommended to use a power supply for the 12V, 3A power supply filter. 3. A 4-8 inch stereo speaker is recommended. 4. Do not short the audio outputs to each other or to the ground. 5. Check carefully before powering up to ensure proper wiring.1This component is 100% brand new. 2Can effectively amplify the power, give the machine a greater impedance, so that the machine has a higher level of performance. 3Because this chip is a digital chip, its efficiency can reach over 90%, so it has the advantages of high power and low heat. 4It is recommended to use a power supply for the 12V, 3A power supply filter. 5Made of high quality materials, stable and durable.