1、This component is 100% brand new. 2、Can effectively amplify the power, give the machine a greater impedance, so that the machine has a higher level of performance. 3、Because this chip is a digital chip, its efficiency can reach over 90%, so it has the advantages of high power and low heat. 4、It is recommended to use a power supply for the 12V, 3A power supply filter. 5、Made of high quality materials, stable and durable. 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.