Subwoofer Bluetooth Receiver Audio Amplifier Board 100W 100W Easy Installation : Bluetooth audio input and , two-channel stereo output, slight sound distortion Digital amplifier board with independent treble and bass control with the help of buttons you can directly adjust the high and low tones with the help of the module amplifier module with powerful chip, AM interference damping function, shielding inductance, noise level front stage operational amplifier, allows you to enjoy better sound quality experience Designed with overvoltage, undervoltage protection , against overheating, short circuit protection, with housing for protecting him The illustration of each interface is printed on Protective plate, making it easy to install and use even without instructions - Inner mesh panties Product model ： ZK-1002T Version: Bluetooth 5.0 (10 meters unobstructed) Input Sensitivity: 500 mV Signal-to-noise ratio: > 90 dB Audio Input: Bluetooth Channel: 2.1 Layout: TPA3116D2 (AM interference suppression function) Speaker customized: 20-100 W, 4-8 Ω Range: DC12-24V/Above 5A (High Voltage High Recommended) Output power: R&L Channel 100W*2 Size: 110x70x21mm / 4,33 2,75 0,83 inch contains: 1 x 3 button amplifier module 1 x Screwdriver 1 x DC 2 x shell