Drug-Free Pain Relief. This TENS unit muscle stimulator can stimulate the sensory nerves and muscles, activate specific natural pain gate mechanism, relax your body and get immediate muscle pain relief anytime you feel the need! Over 1M TENS Device and 20M Electrodes Sold: A leader in physical therapy equipment and accessories for providing immediate and lasting drug-free muscle pain relief from back pain, shoulder pain, neck pain, waist pain, knee pain. (36-month worry-free services and lifetime technical support provided) Straightforward Operation. Modes are clearly labeled on the front of the device along with easy-to-select buttons with body area like "NECK", "SHOULDER", "BACK" and therapeutic technique like "KNEAD”, “ACU (Acupuncture)”, “TAP”. Choosing a TENS mode cannot be easier! Upgraded TENS Kit. AUVON have upgraded all of this stim machine accessories giving you a better pain relief experience. The professional EVA TENS travel case keeps your TENS machine and accessories safe. The 10 upgraded electrode pads in 3 sizes for targeted massage. (4 small 1.5" x 1.5" square pads, 2 medium 2" x 2" square pads, 4 large 2" x 4" rectangular pads) Bigger Battery, 2X Battery Life. No worries about usage interruption for dead AAA batteries any more! It has a 300mAh rechargeable battery to last up to 40h standby time, which beats other TENS with 180mAh by 20h. (Charge it with your wall charger, power bank or laptop using the included Type-C cable)