Instant and soothing muscle pain relief is just a press of a button away with this Tens Muscle Stimulator Unit Massager by Bluestone. Using Transcutaneous Electronic Nerve Stimulation (TENS) therapy this pulse massager triggers natural endorphins and stimulates muscles to contract therefore enhancing the body s natural healing process. Due to its lightweight design this compact unit is small enough to fit into a purse or bookbag and discrete enough to alleviate pain anywhere! IMPORTANT: Avoid buying counterfeit products and transacting with unauthorized sellers. Look for our logo on the packaging for every one of our products. Bluestone is committed to providing the consumer with the absolute best price and value on all of our products which we ensure by applying a rigorous Quality Control process. Bluestone is a registered trademark protected by U.S. Trademark law and will be vigorously defended.