Features: 150W+150W Blue-tooth 5.0 wireless connection, Blue-tooth+AUX audio input, 2.0 channel stereo output. This digital Amp board with independent treble and adjustment buttons,you can directly adjust the treble and through the module, without using the player or speaker. 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. BT Amp module is designed with over-voltage for protection, under-voltage for protection, over-heat for protection, short-circuit for protection, with for case to protective it. The illustration of each interface is printed on the protective plate, making it easy to install and use even without instructions. Specifications: Material: ABS+Alloy Size: 119x70x21mm/4.68x2.75x0.82in Chip: TDA7498E Blue-tooth+AUX audio input Work Voltage: for DC 12V-32V Channel: 2 for CH Stereo Output Blue-tooth version: Blue-tooth 5.0 Blue-tooth transmission distance: 50 Ft Terminating Impedance: 4 - 8 Ohm Match Speaker: 30 - 200watt Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1X Amplifier Board