Features: TPA3255 with high power class D power amplifier chip, which has class D efficiency and can bring real high-end sound quality circuits. The device has advanced integrated feedback design and proprietary high-speed gate driver error correction function. The high technology enables the device to maintain ultra-low distortion in the entire audio frequency while displaying sound quality. The device operates in AD mode. When the THD-1.5%, it can drive up to two 315W/4R loads and two 150W (unshipped power)/8R loads, and has a unique 2 VRMS analog input interface, . With excellent audio performances, the TPA3255 also has two advantages: high power efficiency and ultra-low idle power loss (less than 2.5W). Specifications: Product Name: TPA3116D2 Digital Power Amplifier Board Supply Voltage: DC19-48V ( Above 5A Current Recommended) Output Power: 2x 315W Input Method: 3.5mm stereo Port Signal to Noise Ratio: 100dB Track number: Dual Channel Stereo Product size: approx 110x70x30mm/0.43x2.76x1.18in Material: ABS+ Metal Weight: 120g Package Includes: 1x TPA3255 Digital Power Amplifier Board 1x User Manual note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.