[MULTI PROTECTION] BT 5.0 amplifier board with anti-reverse, under-voltage, over-temperature, over-current, and short-circuit protection mechanisms. [HIGH POWER] Output power increases with higher supply voltage and smaller speaker impedance, delivering a powerful 160W+160W+220W output. [WIDE COMPATIBILITY] Stable and fast connections with wide compatibility for various devices and setups. [EASY ADJUSTMENT] Adjust frequency levels, treble, and bass effortlessly with this USB stereo power amplifier module. [BUILT-IN COOLING FAN] -quiet fan prevents rotor burnout, extends lifespan, and operates noiselessly.