Has 8 TENS (Transcutaneous Electrical Nerve Stimulation) Modes: For pain relief and arthritis. FDA Cleared. Has 6 EMS (Electrical Muscle Stimulation) Modes: For muscle conditioning, strength, endurance, exercise warm up and muscle recovery. FDA Cleared. The device is also compact enough, making it easy to carry, wear on your hip or just have in your pocket with a sleek and modern design in white and blue back lit display. The large digital display makes it easy to select a, program, mode, and pulse setting. Easily view the program you are on with description of Therapy Mode. High output prescription grade output. Avoid the hassle of insurance billing with this RX to OTC 2 in 1 TENS + EMS Unit. Includes lead wires, (4) 2? x 2? and (2) 3.5? x 5? self-adhesive reusable electrodes, rechargeable lithium ion battery, USB/ AC adapter, clear belt clip holder, tote bag, quick start guide, and instruction manual.