Temporarily relieve neck and shoulder pain in the comfort of your home. DR-HO'S Neck Pain Pro combines TENS (Transcutaneous Electrical Nerve Stimulation), EMS (Electrical Muscle Stimulation), and proprietary Auto-Modulating Pulse (AMP) technology to temporarily relieve neck and shoulder pain. Unlike other TENS devices that typically offer only one mode of stimulation that the body may adapt to, DR-HO'S AMP technology delivers over 300 types of stimulation to provide constantly changing therapeutic waves. This allows for safe, effective, temporary pain relief of sore and achy muscles, to provide symptomatic relief of chronic pain and arthritic pain.