This night light is touch-controlled, with a short touch turning the light on or off, and a long touch adjusting the brightness.The side of the light has a USB A 3.0 female port.So when using a USB port for power or data transfer, this USB adapter night light can provide illumination without affecting the original power and data transfer functions. If there are extra USB chargers at home, adding this product to use as a night light is also very suitable.When charging your phone at night or using a PC or laptop, this very small and portable product can provide you with up to 1W of light illumination, And it's as if it doesn't occupy a USB port.