Wahl® Bravura® Lithium Cordless Clipper, GunmetalDurable, lightweight cordless clipper is exceptionally quiet and has virtually no vibration Runs continuously for 90 minutes on a fully charged battery 60 minute full charge time and the ability to use the clipper as a corded unit while charging so you never lose precious grooming time Features Constant Speed Control, a built in torque control that automatically delivers more power when clipping through matted or thick hair Lithium Ion no memory