ECOLA Colorful Cleaner Mini USB VACUUM for Keyboard/Laptop/Computer/Car Compressed Air Duster (Blue) Simply plug into any computer USB port for power and press the button. Connect the vacuum to the usb port of your laptop computer or mobile power. Two vacuum cleaner device configuration and two color cover can be replaced according to the use environment. Press the power switch, clean up work with a suitable suction head. After a period of time,press the buckle switch cover,clean the lid can continue to use.