Now with removable battery for fast, easy replacement and no downtime. Heavy-duty, detachable blade clipper in a cordless design delivers a 3-hour run time on a 2-hour charge. Lithium-ion power mated with powerful rotary motor to cut any hair type - wet or dry. 5 speeds: Adjustable from 1,800 to 3,800 strokes per minute. Ceramic blade runs cooler and stays sharper. Works with all UltraEdge and CeramicEdge blades.