Accelerate recovery and put an end to pain and discomfort with the Chronic Pain Blocker. FDA-cleared to relieve chronic and acute pain, this ultra-compact device conveniently fits in your pocket to deliver on-the-go relief when and where you need it most. Attach the pain-relief pads anywhere on your body (back, neck, shoulders, knees, etc.) and active electric fields immediately block the transmission of pain signals directly at the nerve. Just one 30-minute treatment significantly reduces pain for up to 24 hours! Charger plugs into an AC outlet.