Description: product information: PAM8403 is a small digital power amplifier chip, high-definition sound quality highlights the advantages of digital chips, The circuit adopts reasonable peripheral configuration, and the power filter is upgraded to 470uf (some sellers do not even have 100uf or even no capacitance) 1.6mm glass fiber board, which really makes the power amplifier board meticulous, and outputs 3W 3W high-fidelity sound quality. A rare good product for amplifier enthusiasts, The potentiometer adopts the original anti-meter body, with a lifespan of up to 15 years, and the potentiometer with a switch can directly cut off the power supply counterclockwise. It has been well received by buyers since its listing! Specifications: Product Parameter Product name: PAM8403 digital power amplifier board Specification model: XTW8403 Power supply range: 5v DC Lowest output: 3W*2 Appearance size: 29.5*20.2*15mm (without protruding potentiometer rod) Package Included: 1*audio amplifier board Notes: Due to the difference between different monitors, the pictures may not reflect the actual color of the item. Compare the detail sizes with yours, please allow 1-3cm error, due to manual measurement. Please leaving a message before you give the bad feedback, if the products have some problems. Thanks for your understandings.