The heavy duty Supra ZR detachable blade clipper delivers corded power in a cordless designnDetachable blade design provides greater versatility from multiple blade optionsnLithium-ion power mated with powerful rotary motor to cut any hair type - wet or drynTwo hour run time; 2 hour charging timenHeavy-duty, detachble blade clipper now in cordless design delivers a 2-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.