A cordless hair clipper is a battery-powered device used for cutting human hair. It often comes with a set of attachments of various lengths called guards. These are used for controlling the length of the hair.
Cordless hair clippers use two levels of tiny, comb-like blades that use an electric motor to move across each other in opposite directions. Clippers are propelled over the head or other skin surface by hand. The device can be plugged into a wall outlet for use as a corded hair clipper or to charge the battery. When the battery has been charged, it can be used without the electric cord.