The module's anti-noise ability has been greatly improved, delivering clear, identifiable sound with minimal background noise and clean audio output. Uses a dual-bridge power supply design, where each chip has an independent rectifier bridge and capacitor system, reducing interference and enhancing channel separation for left and right channels. The white 3P socket is an industry-standard connector, compatible with external modules such as decoder boards and Bluetooth modules, offering wide application. The blue 3P terminal allows direct connection to pre-stage tuning boards and volume potentiometers, enabling quick and convenient setup. For power supply, we recommend using a 40W80W dual power transformer with 11V15V output. Do not exceed 15V, as higher voltage may damage the board due to its small to medium power design. It is advisable to measure the voltage before powering on. Product model: LM1875 dual-channel 2.0 stereo power amplifier board Power supply: dual power, 1115V (recommended, not to exceed 15V) Output impedance: 4 ohm, 8 ohm Power output: 2 x 20W Features: high-quality materials, simple structure, efficient power amplifier circuit, reliable performance, and broad compatibility. Just pair with a 50W transformer for easy setup. Color: black Material: ABS Dimensions: 68mm x 76mm Package includes: 1 x amplifier board Note: Package includes only the items listed above. Other accessories are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement tolerance: 13 cm.