Lithium-ion technology provides constant power throughout the life of the battery without reduction of speed or performance. Delivers over 1 hour of run time on a single charge – 2x longer than other shavers. Lightweight – weighs less than 5 oz for comfortable, fatigue-free use. Powerful and quiet professional grade rotary motor. Gold titanium hypo-allergenic foil for irritation-free shaving. Premium housing with durable and stylish metallic copper color.