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

Bluetooth Audio
Amplifier Board: JR-TB21 is a subwoofer audio amplifier board, with 50W+50W+100W Bluetooth 5.0 wireless connection, Bluetooth+AUX+USB 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. ^^ 2.1 Channel
Power Amplifier Module: JR-TB21 audio power amplifier module with mini size 10 x10 x 2.2 cm / 3.94 in* 3.94 in* 0.86 inch, but Powerful, Dual channel stereo output power 50W+50W+100W, suitable for 4-8 speakers, It is recommended to use 20-100W speakers for the best effect.
^^ Bluetooth 5.0 Inputs: The Bluetooth power amplifier board with 3 kind of inputs: AUX and Bluetooth inputs, the upgrade large chips support Bluetooth 5.0, low latency, The range of audio devices (smartphones, tablets, laptops, etc. ) with Bluetooth connectivity is 15m/49ft. ^^ 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: 3.94 in* 3.94 in* 0.86 inch, easy to carry.