Product Name: 2.1 Channel TPA3116D2  Digital Amplifier
AMP Chip: dual TPA3116D2
Max Output Power: 2*50W+100W
Power Supply: DC12~24V
Channels: 2.1
Efficiency: 90%
Output Impedance:  left/right 4-8 ohm, Subwoofer 2-8 ohm
Audio Input: Bluetooth / AUX 
Bluetooth Version: 5.0
Working Type: Class D
Size: 100*101*25mm

Function Instructions:
1. Default Bluetooth mode is Default
2. When Bluetooth disconnected, long press the Volume button to Switch to AUX
3. When Bluetooth playing, short press Volume button to Pause / Play