1,This component is . 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 materials, stable and durable. Features: This component is . 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 materials, stable and durable. Specification: Power supply voltage: DC 7V-15V Output power: 10W and 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 x 25 x 2.5mm / 1.18 x 0.98 x 0.1inch Package list: 1 x 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.