ZK-TB21 Bluetooth 5.0 2.1 Channel Audio Amplifier Board 200W (50Wx2+100W) Stereo HiFi Amplifier with Subwoofer Output 9V-24V

About this item: 【Bluetooth & 3.5mm AUX】 The ZK-TB21 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-TB21, 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*2.1mm) basically can meet the needs of the ZK-TB21 Bluetooth power amplifier board. If your existing DC power plug is not 5.5mm*2.1mm, there is no The problem is because we have included a DC conversion plug in the product. 【Protection function】ZK-TB21 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