Heavy-duty, detachable 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 Ultra Edge and Ceramic Edge blades.