Equipped with backlight function, usable in low-light environments. Compact structure, supports multiple installation methods, suitable for various DIY scenarios. PWM speed control technology precisely controls fan speed, effectively reducing power consumption and noise. 5V boost to 12V: When 5v 4a=20W power input, after voltage boosted, its real output power =12v 1.5a≈18W (Note: When use this gonvernor, pls use normal cable. NO USE FAST CHARGING CABLE)