1. Audio Power Amplifier BoardZK 1002T with 100W 100W power output and Bluetooth 5.0 wireless connection function, Bluetooth AUX input, 2.0 channel stereo output, with just a little sound distortion. Treble and Bass control. More functions on the APP waiting for you to discover. Note: When using AUX mode, please confirm that the Bluetooth connection of this module has been disconnected2. Perfect Sound Quality ExperienceThe audio power subwoofer amplifier module with a powerful audio chip, AM interference suppression function, shielding power inductance, low noise front stage operational amplifier, delivering clear highs and deep lows, as well as a mix of highs and lows, allowing you to enjoy a more perfect sound quality experience3. Treble and Bass AdjustmentThis 1002T digital Amp board has independent treble and bass adjustment buttons. You can directly adjust the treble and bass through the module without using the player or speaker. Those with more demanding music sound effects can adjust the treble and bass buttons to suit their style4. With Protective FunctionThis Bluetooth Amp module is designed with over voltage protection, under voltage protection, over heat protection, short circuit protection, and comes with a case for protection