[Bluetooth & 3.5mm AUX] 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.
[Treble and bass adjustment]If you are tired of power amplifiers with only a single volume knob, then you feel right, because you have further requirements for audio. By adjusting the high and low frequency knobs of ZK-MT21, you can make the sound more layered and make the bass more shocking.
[High compatibility]The DC adapters on the market (plug specification 5.5mm x 2.1mm) basically can meet the needs of the ZK-MT21 Bluetooth power amplifier board. If your existing DC power plug is not 5.5mm x 2.1mm, there is no The problem is because we have included a DC conversion plug in the product.
[Protection function]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. When an overload occurs, the device reports the fault condition to the processor to protect itself from damage

Colour:black
Material:pcb
Size:90 x 93 x 22mm

Package Contents:
1 x ZK-MT21 power amplifier board

Only the above package content, other products are not included.
Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.