Features: The bluetooth-compatible audio power amplifier modules has 2.1 channels and the maximum output power is 2X50W+100W. It has two audio input modes, AUX-and bluetooth-compatible, and two-in-one power amplifier board. bluetooth-compatible5.1, high transmission efficiency, long transmission distance. It adopts copper-DC connectors and barrier terminals. It can withstand- high current without heating or damaging wires. With bass-, trebles, subwoofer frequency and volume control, you can easily adjust the volume. It is widely used in shopping malls, home theaters, speaker, etc. The product does not contain microphone, which should be provided by itself. It is recommended-to use wireless microphone with receiver. Specifications: Material:ABS Bluetooth-compatible version: 5.1 (unobstructed, 15meters) Input method: AUX+ Bluetooth-compatible + U-disk +USB Sound Card + Microphone Number of channels: 2.1 channels Adapter power supply: DC12-24V Package Includes: 1x Power Amplifier note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.