1: The TPA3255 is a high-performance Class D power amplifier, which has Class D efficiency and can bring true high-end sound quality. 2: The device features advanced integrated feedback design and proprietary high-speed gate driver error correction function (PurePath Ultra HD). This technology enables the device to maintain ultra-low distortion in the entire audio frequency band, while displaying wonderful sound quality. 3: TPA3255 chip 4: The electrolytic capacitor uses gold lettered 1200UF/50V to strong continuous . 5: Professional high current inductor is used to clean and powerful sound. On board subwoofer/full frequency switch, easy to use. Parameter: Working mode: Class D Working voltage: DC30V-42V Bass cut-off frequency: 95HZ Total harmonic distortion+noise (+N): total output power 600W/2 ohm at 1% Colour:green Material:plastic Size:150 x 75 x 35mm Package Contents: 1 x Audio Amplifier Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.