The AccuRelief Wireless TENS Unit and EMS muscle stimulator offers a safe, non-addictive, solution for pain relief. It can be controlled wirelessly with the included handheld remote or mobile application available on the App Store and Google Play Store. This 3-in-1 combo device features 14 preset programs and 60 levels of adjustable intensity. The TENS mode blocks pain signals from the site of pain to the brain and promotes endorphin production, while the EMS mode contracts and relaxes muscles. The package includes a remote control, a rechargeable lithium-ion battery, 4 adhesive electrode pads, a USB charging cable, and 2 AAA batteries. Ideal for neck, back, lower back, shoulder pain, and pain associated with carpal tunnel and tennis elbow.