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. 5 speeds: Adjustable from 2,500 to 4,500 strokes per minute. Works with all UltraEdge®, CeramicEdge® and Showedge® blades.