1. Amplifier output can only be connected to independent speakers or passive speakers
2. The product does not include a power supply, you need to provide their own power supply DC9-24V, pay attention to the quality of the power supply, you need a pure DC power supply, with a complete rectifier filter, such as directly separate transformer will burn out
3. In the case of sufficient audio input, power supply voltage/current is sufficient, there will be enough output power
4. The higher the power supply voltage, the higher the output power, the lower the impedance of the speaker, the higher the output power
5. Please make sure that the power of the adapted power supply is greater than the actual working power of the amplifier

Parameters:
1. Bluetooth version: 5.0
2. Transmission distance: 15 meters without blocking
3. Signal-to-noise ratio: greater than 95dB
4. Input mode: USB+AUX+bluetooth
5. Number of channels: left and right dual-channel (stereo)
6. Amplifier chip: TPA3116D2 (with AM interference suppression)
7. Adaptable power supply: DC9-24V/5A or above (the higher the voltage, the higher the output power)
8. Adaptable Speaker: 20-200W, 2-8Ω
9. Output power:
- 20W x 2 @12V, 8Ω 35W x 2 @12V, 4Ω
- 35W x 2 @19V, 8Ω 60W x 2 @19V, 4Ω
- 50W x 2 @24V, 8Ω 90W x 2 @24V, 4Ω
10. Protection mechanism: over-voltage, under-voltage, overheating, DC detection, short-circuit protection
11. Size: 100 x 77 x 22mm
12. Weight: 185g (including packaging)