Wahl professional 5-star series cordless senior (#8504-400). The 5 star cordless senior is a one of a kind clipper with its precision fade blades metal bottom housing and cord/cordless capabilities. Its powerful rotary motor results in consistent power to tackle thick hair. The 2191 blades are adjustable with zero-overlap capabilities. The 5 star cordless senior offers a high-quality lithium-ion battery with 70 minutes of run-time per charge and its ergonomic design fits comfortably in hand for easy maneuverability.