Bluetooth 5.0 Audio Amplifier Board, ZK-MT21 2.1 Channel 50W X 2 +100W Amp Mini Subwoofer Power Amp HiFi Digital Audio Amp Module for Home Speakers (20-100W, 4-8), DC 12-24V, BT AUX Input

Subwoofer Audio
Amplifier Board: This ZK-MT21 features two powerful HiFi audio chip drives, 4 low-noise preamplifiers, and a large-capacity energy storage capacitor, with only a little sound distortion. 2.1 channel 50W * 2 + 100W stereo and subwoofer output. In addition, it comes with an antenna holder solder joint for external antenna connection (antenna not included in the package).
Bluetooth 5.0 AUX INPUT: This MT21 is designed with 2 types of inputs: Bluetooth 5.0 wireless connection, with a transmission distance of up to 49 feet (without obstruction), and 3.5 mm AUX audio input.
Note: When using AUX mode, please confirm that the Bluetooth connection of this module has been disconnected.
Treble and Bass Adjustment: This digital amp board has independent treble and bass adjustment buttons, so you can directly adjust the treble and bass through the module. By adjusting the high and low frequency knobs of the ZK-MT21, you can make the sound more layered, the bass more shocking, and the treble more clear, enjoying HiFi sound quality.
With Protective Function: This MT21 Bluetooth amp module is designed with over-voltage protection, under-voltage protection, over-heat protection, and short-circuit protection, with a case to protect it. Mini Size and
Easy Installation: The illustration of each interface is printed on the protective plate, making it easy to install and use even without instructions.
Small size: 3.74 in * 3.54 in * 0.87 in, easy to carry, suitable for home, car, bar, party and outdoor use