Description: 2.1 Channel: The for amplifier board is designed to be 2.1 channel, so it can provide you with stereo sound with powerful subwoofer. Portable: The module can be easily taken to any places to use due to its small size and weight. Heat-releasing: The module is equipped with one heat conducting silicone, which can effectively help you to release heat. Rotary Knob: The for amplifier board is designed with rotary knob that can be easily used to adjust volume. Wireless Connection: The module is bluetooth-compatible 5.0, which can be easily operated from far away places. Specification: Color: Shown as Picture. Size: Approx. 95x88x25mm/3.74x3.46x0.98inch. Channel: 2.1. Voltage: Above DC5-26V/10A. Bluetooth-compatible: 5.0. Audio Input: Bluetooth-compatible, for AUX, U-Disk, USB Sound Card. Audio Output: Left Right Channel, Subwoofer, 3.5mm Stereo Output. Volume Adjustable: Rotary Knob. Frequency Range: 20Hz-30KHz. SNR: 92db. Output Power: 50Wx2+100W. Fits Speaker: 10W-100W/42-802(Left Right Channel), 20W-200W/40-80(Subwoofer). APP Control: Replacement for Sinilink. Note: There might be a few color distortions due to different computer resolutions. There might be a slight error due to different hand measurements. Package Includes: 1 Piece for Amplifier Board.