Features: Support wide voltage input:15-36V, power up to 160w+160w+220w. The TDA7498E chip solution: stereo dual-channel output to ensure continuous serial high-power operation. If you are tired of an amplifier with only one volume knob, then you feel right, because you have further requirements for audio. It has short-circuit protections, over-current, over-heat, and anti-reverse protections. When an over-load occurs, the device reports the fault conditions to the processor to protect itself from damage. Support wuzhi- audio app-, custom blue tooth name, password- setting, etc. Specifications: Size: approx 106x126x29mm/4.2x5x1-inch Audio input: Blue teeth+AUX+USB drive+USB sound card Audio output: 160w+160w+220w Applicable power supply: DC15-36V Note: Please allow 1-3cm error due to manual measurement. please 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 Audio Amplifier Board