The OMRON Pocket Pain Pro® TENS device (PM400) is a simple but powerful, drug-free solution for relief of chronic, acute* and arthritic pain. It is a small, portable, easy-to-use, drug-free solution for achy, stiff or sore muscles and joint pain. Pocket Pain Pro is designed to reduce and relieve pain, stiffness and numbness in multiple pain areas including the lower back, arms, legs, shoulders and feet by applying electrical nerve stimulation to the surface of the skin near the site of the pain. This drug-free option for pain relief is available without a prescription and may help manage your pain in as little as 15 minutes. OMRON, the pain relief experts for over 20 years, gives you personalized control of this powerful, portable TENS unit. The Pocket Pain Pro uses comfortable, self-adhesive Long Life Pads™ that can be used up to 150 times. HSA/FSA EligibleAcute pain refers to sore or achy muscles due to strain from exercise or normal household and work activities.NOTE: Use this unit only with the leads, electrodes, and accessories recommended by OMRON to avoid damage to the unit.TENS DRUG-FREE TECHNOLOGY: Scientific theory suggests that Transcutaneous Electrical Nerve Stimulation (TENS) may block the pain signal from reaching the brain, increase blood circulation to targeted areas and stimulate your body's natural painkillersPERSONALIZED CONTROL: Three pre-set body pain programs (Arm/Shoulder, Lower Back and Leg/Foot) and two massage-like modes (Knead and Steady) each with 10 adjustable levels of power intensity to help relieve pain almost anywhereCONVENIENT: Small, portable, easy-to-use, and can be used anywhere discreetly COMFORTABLE: Includes comfortable, self-adhesive Long Life Pads (1 pair) that are reusable up to 150 times and a plastic holder for storageSAFE AND EFFECTIVE: 100% drug-free relief for multiple pain areas including the lower back, arms, legs, shoulders and feet