Omron electroTHERAPY Pain Relief is a simple drug-free solution for relief of achy stiff or sore muscle and joint pain. Available without a prescription this easy-to-use TENS unit can help manage your pain in as little as 15 minutes exactly where you need it. It is one solution for multiple body pains. TENS Technology: Transcutaneous Electrical Nerve Stimulation (TENS) technology has been used by medical professionals such as physical therapists and chiropractors for more than 30 years; Relieves Multiple Body Pains: Temporarily reduces pain in the lower back arms shoulders legs thighs hips feet knees elbows and ankles; Personalized Therapy: 3 pre-set programs (arm lower back leg/foot) each with 5 intensity levels; Safe & Effective: FDA cleared and prescription free for home use; Portable: Comfortably fits in your hand or pocket and can be used discretely anywhere; Long Life Pads: includes comfortable self-adhesive pads that are reusable up to 150 times with plastic holder for storage. Includes unit electrode cords 2 Long Life pads pad holder 2 AAA batteries instruction manual quick start guide & pad placement guides.