The Underarm Toner uses Electrical Muscle Stimulation (E.M.S.) to stimulate the muscles for a sleek, toned look. ¥ Portable Electrical Muscle Stimulation (E.M.S.) device ¥ Includes rechargeable controller, 2 arm pads and replaceable gel pads ¥ Electrical signals contract the muscles involuntarily ¥ Use 15 minutes a day for more toned arms in 1 to 2 months ¥ 10 E.M.S. modes ¥ Adjustable electrical intensity ¥ Left and right arms can be adjusted independently ¥ Replacement gel pads available at SharperImage.com (Item No. 208635) ¥ Charges via USB