Bluetooth audio amplifier module 2.0 dual-channel stereo output, maximum output power of 2X50W, adjustment of high and low. AUX and Bluetooth-compatible audio input mode, two in one power amplifier board. Bluetooth-compatible 5.0, transmission efficiency is higher, transmission distance is longer. With short circuit protection and over current, over heat, anti - reverse connection protection, to prevent comprehensive failure. When an overload occurs, the device reports the failure to the processor to protect itself from damage Use copper DC connector and fence terminal. Can withstand large current, do not heat, do not damage the wire. With , treble, subwoofer frequency and volume control, easily adjust the volume, enjoy the music you want to sound. Widely used in shopping malls, home theaters, speakers and so on. Specification: Model: -502T Bluetooth-compatible Version: 5.0(no occlusion, 10m) SNR: >90dB Input mode: AUX+ Bluetooth-compatible Number of channels: left and right double channels (stereo) Power amplifier chip: TPA3116D2(with AM interference suppression function) Adaptive power supply: DC9~24V/2A or above (the higher the voltage, the greater the output power) Adapter horn: 15~100W, 4~8 Output power: 15W*2 12V, 8 ohms; 30W*2 12V, 4 ohms 20W*2 19V, 8 ohms; 40W*2 19V, 4 ohms 30W*2 24V, 8 ohms; 50W*2 24V, 4 ohms Protection mechanism: overvoltage, undervoltage, overheat, DC detection, short circuit protection Tip: Only when the audio input is enough and the power supply voltage/current is enough, there be enough output power!! The higher the power supply voltage, the greater the output power, the smaller the horn impedance, the greater the output power!! Please that the adapter power is the actualworking power of the amplifier!! Color: Black Material: PCB+Plastic+Metal Package Contents: 1*Amplifier board 1*Adapter 1*Screwdriver (random color and style) 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.