Bluetooth Audio Amplifier Board, ZK-TB21 2.1CH 50W x 2 +100W Subwoofer Power Amp with Treble and Bass Control, Bluetooth5.0 and AUX Inputs, Stereo Digital AMP for DIY Home Speakers

Subwoofer Audio
Amplifier Board: 50W+50W+100W Bluetooth 5.0 wireless connection, Bluetooth+AUX audio input, 2.1 channel stereo output, just a little sound distortion.
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 with independent treble and bass adjustment buttons, you can directly adjust the treble and bass through the module, without using the player or speaker; ^^ Perfect
Sound Quality Experience: The audio power subwoofer amplifier module with powerful chip, AM interference suppression function, shielding power inductance, low noise front stage operational amplifier, let you enjoy a more perfect sound quality experience; ^^
With Protective Function: This Bluetooth Amp module is designed with over-voltage protection, under-voltage protection, over-heat protection, short-circuit protection, with case to protective it; ^^ Easy Installation and
Use: The illustration of each interface is printed on the protective plate, making it easy to install and use even without instructions.
Small size: 4.72 in* 3.94 in* 0.7 in, easy to carry;