TPA3251D2 power amplifier board, Lossless components, Multi-interface input. Gold-plated RCA--Reliable contact and good shielding. The AP2202 is designed with audio amplifier chip TPA3251D2. TPA3251D2 is a high performance class-D power amplifier thatenables true premium sound quality with class-D efficiency. lt features an advanced integrated feedback design andproprietary high-speed gate driver error correction (PurePathTm Ultra-HD).This technology allows ultra low distortion acrossthe audio band and superior audio quality. High Efficiency, Low Power, Consumption, HD Audio Quality, and Comprehensive Protection Mechanism. One key bridging (Paralleled outputs). Colour:black Material:PCB+components+metal NOTE: Restart after enable PBTL mode. In PBTL mode, the default audio input is for the left channel, but it can also accept both left and right channels input simultaneously. The actual product may have slight color difference or difference, which will not affect the use Package Contents: 1 * Audio Power Amplifier Board