Specification:
Item Type: Mini Bluetooth 5.0 Power Amplifier
Feature Type: 2.0 Stereo
Output Power: 50W and 50W
Power Supply: DC9V-24V
Bluetooth Distance: Approx. 12meter / 39.4ft(barrier )
Bluetooth Protocol: 5.0
Product Size(LxWxH): Approx. 110 x 90 x 50mm / 4.33 x 3.54 x 1.97in
Audio Input: 3.5mm stereo sound input, stereo sound input, small memory card, U disk, USB audio input(can be connected to computer, mobile phone, OTG, tablet OTG)

Package List:
1 x Mini Bluetooth 5.0 Power Amplifier
1 x User Manual

Note:
Power And Power:
The power amplifier adopts for TPA 3116 chip, the actual output power can reach 50W per channel, 2 channels total 100W (24V power supply), equipped with 12V5A power supply. The output power is 30Wx2 (4 ohms), if connected to 8 ohm speakers. The output is about 15Wx2. If you need more power, you can configure the power supply yourself. Be careful not to exceed 24V, otherwise the chip will be burned, and the power supply should not be too small, because power = voltage x current, if the current power is less than 50W, then There may be a power outage.
Amplifier Output:
The power amplifier is a constant power amplifier, supporting passive audio or speaker of 4, 6, 8, 16 ohms. Cannot be connected to active audio such as computer audio, and not suitable for passive subwoofers. The four pillars behind the power amplifier are output interfaces, and cannot be connected to 3.5mm headphone plugs or lotus plugs.
Car Modification:
Conventional 12V batteries for cars and motorcycles can be directly modified for power supply. 24V batteries such as large trucks are not recommended, because the voltage will exceed 24V after the car is started. Unless you reduce the voltage through other equipment, the power amplifier will heat up too much. Long term use is not good for the chip, or even burns out.