This Dynatronics Dual-Channel Analog TENS Unit with a Timer is a reliable device that provides relief from chronic pain. The wearable unit has 2 channels and is made by the trusted brand Dynatronics. It is intended for use in physical medicine and rehabilitation, making it a great addition to any medical or lab equipment collection. The TENS unit is designed to help manage pain without the use of medication, making it a safe and effective alternative. It is perfect for those with chronic pain conditions and can be used in a variety of settings. Don't miss out on the opportunity to add this high-quality TENS unit to your collection. Also included Icyhot Smart Relief Back Refill Pads new box 2 new packs batteries CR2032