The DFRobot powerful Bluetooth amplifier has AM interference and filtering function that makes the board THD as low as 0.1%even when working for a long time at large power output, while bringing you clear and round sound. The board features DC9-24V power supply, AUX+Bluetooth 5.0 audio input, and 50Woutput power. It has 3 adjustable knobs that are used to power on/off and control the main volume, bass, and treble. This product works well with 4-8Ω, 15W-100W passive speakers. The Bluetooth amplifier board comes with bottom/top protective panels and supports protection mechanisms including over-voltage, under-voltage, overheating, short-circuit protection, and DC detection.

Power supply 9-24V/2A above
Input AUX+Bluetooth 5.0
Output power 50W*2
Compatible speaker 15W-100W, 4Ω-8Ω
Channel left/right channel (Stereo)
Bluetooth transmission distance 10m