Now with a removable battery for quick and easy replacement. Improved run-time of 3-hours 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 No 10 ceramicedge blade. Runs cooler and stays sharper than steel. Works with all Ultra edge ceramicedge and show edge blades