Slendertone ARMS Muscle Training System Arm muscle training system for firming and toning biceps and triceps Uses EMS technology to create strong, deep muscle contractions Produces toned, stronger arms within 4 weeks (when used 5 times weekly) Conditioning, strength, and power training programs; 0 to 99 intensity levels Includes gel pads and rechargeable controller; fits arms from 10 to 19.5 inches