- The ZK-MT21 power amplifier board uses Bluetooth 5.0, and its transmission distance can reach 49 feet (without obstruction). At the same time, this power amplifier board has a 3.5mm AUX audio input interface. No matter what kind of input method, you can always find a method that suits you

- With bass, treble, subwoofer frequency and volume control, easy to adjust volume, enjoy the music tone what you want. If you are tired of the inherent high & low bass, why not try the high & low control knob. This will make you feel like being in a movie theater

- Bluetooth audio amplifier module 2.1 channel, Max output power 2X50W+100W. The signal is better, the efficiency is high, and the anti-interference ability is strong

- ZK-MT21 Bluetooth power amplifier board has multiple protection mechanisms to ensure its safe operation. It has short circuit protection, over-current, over-heat, and anti-reverse protection(NOTE: It is recommended that the maximum voltage should not exceed 22V. Otherwise, overvoltage protection may be triggered, which will limit the output current and cause the maximum power to be reduced)

- It adopts copper DC connector and fence type terminal. It can withstand large current, no heat, no damage to the wire. Using a universal 5.5mm * 2.1mm plug interface for power supply
