IFI Class D power amplifier board with ultra-low distortion of 0.02%. High-grade material craftsmanship, rigorous design, precision production, ultra-small volume construction with high-quality materials. Power amplifier type: Class D digital power amplifier board Power amplifier chip model: TI high-level TPA3221DDDVR high-definition Class D power amplifier IC SNR: 108dB Distortion: less than 0.02% THD+N at 1kHz Gain: 30dB Support speaker impedance: 4-8 ohm Output power: maximum output power 2 x 60W Number of channels: 2 channels (Stereo) Power supply voltage/current: DC voltage 9V-17V, current 3A or above (charger may not function properly; please use a power adapter or switch power supply) Sound source input: physical interface HX2.54 Size: 80mm long, 39mm wide, 5mm high Color: As shown Material: PCB The actual product may have slight color differences, which will not affect usage. Package Contents: 1 x amplifier board Only the above package content included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement allowed error is +/- 1-3cm.