Andis Supra ZR II Detachable Blade ClipperHeavy Duty, detachable blade clipper with cordless design delivers a 3 hour runtime on a 2 hour charge Removable lithium ion battery mated with powerful rotary motor to cut any hair type wet or dry Detachable Blade design offers advantage of multiple blade options to achieve just the right cut length for your styling needs 5 speeds: Adjustable from 1,800 to 3,800 strokes per minute Works with all Andis UltraEdge and CeramicEdge blades