Slendertone Flex Pro Arms: * Uses clinically demonstrated EMS technology * 3 training programs: Conditioning, Strength and Power * Work both triceps and bicep muscles and arms simultaneously * Easy to use * Training levels 0-99 allow for increased intensity for maximum results * Garments fit a circumference of 10"-19.5" * The unique construction of the Slendertone Arms Muscle Training System features two pre-positioned on each arm, medical-grade GelPads that cover triceps and biceps muscles * During your toning session, signals from the Slendertone Arms Muscle Training System reach out to nerves where they are most concentrated * These nerves branch out to the triceps and biceps muscles causing them to contract and relax naturally, working all of the muscles at the same time, not just those directly under the GelPads * Plastic, polyurethane and nylon materials * Black * 2-year limited warranty * Model# 0397-5014