Now with a removable battery for quick and easy replacement! 3-hours of run-time on a single 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. Equipped with a size #40SS CeramicEdge blade, runs cooler and stays sharper than steel. Works with all UltraEdge® CeramicEdge® and Show Edge blades.