Tip: Only when the audio input is sufficient and the power supply voltage/current is sufficient will there be enough output power!
The higher the power supply voltage, the greater the output power, and the smaller the speaker impedance, the greater the output power!
Please make sure that the power of the adapted power supply is greater than the actual working power of the power amplifier!

Product name: 50W*2 Bluetooth audio amplifier module with tone
Product Model: ZK-502T
Bluetooth version: 5.0 (unblocked, 10 meters)
Signal-to-noise ratio: Greater than 90dB
Input method: AUX+Bluetooth
Power amplifier chip: TPA3116D2 (with AM interference suppression function)
Adapter speaker: 15~100W, 4-8Ω
Number of channels: left and right dual channel stereo
Protection mechanism: overvoltage, undervoltage, overheating, DC detection, short circuit protection
Adapter power supply: DC9~24V, above 2A (the higher the voltage, the greater the output power)
Power supply voltage: 15W*2@12V 8Ω; 30W*2@12V 4Ω; 20W*2@19V 8Ω; 40W*2@19V 4Ω; 30W-2@24V 8Ω; 50W*2@24V 4Ω
Product size: 110 x 70 x 21mm
Material: PCB+Metal
colour: black

Package Contents:
1 x ZK-502T bluetooth audio amplifier board
1 x Screwdriver
1 x Power cord