The Chirp HALO is the world's most innovative muscle stimulator. It has 5 pre-programmed settings to strengthen and relieve pain to any muscle group in your body. The online web-based guide directs you exactly where to place the HALO stimulators to treat pain and decrease recovery time. This is an FDA registered Class II Medical Device that is used by professionals worldwide. DESIGN & DETAILS: Web-based Guide Instructs Where to Place Pads to Ensure Proper Application Includes 1 Rechargeable Wireless HALO Stimulator Includes 4 Muscle Stimulator Pads: 1 Large Lower Back Pad, 1 Large Trigger Point Pad, 2 Small Trigger Point Pads Includes 1 Extension Cable to triangulate muscle group stimulation Utilizes TENS (Pain Relief Stimulation) and NMES (Muscle Strengthening) Technology Rechargeable Case Wireless Remote Control Utilizes TENS (Pain Relief Stimulation) and NMES (Muscle Strengthening) Technology Safe, Simple, and Effective Treatment of Back, Shoulder, Leg, and Arm Pain