1. Dual Channel: This TENS/EMS pain relief device features a dualchannel design, allowing you to control the intensity and duration of Channel A or Channel B as needed. It electrically stimulates nerves through the skin, inhibiting pain transmission in nerve fibers to alleviate or suppress pain, providing instant relaxation and comfort. 2. 6 Modes 11 Intensities: The TENS/EMS pain relief device offers 6 modes and 11 intensity levels. Acupuncture, cupping, manual therapy, strobe, Gua Sha, and massage help relieve muscle and joint pain while reducing body stress. 3. Quality Materials: The main unit of the TENS/EMS pain relief device is made of quality ABS material, which boasts strength, hardness, and toughness, ensuring and stable performance, practicality, and durability. 4. Two Charging Methods: The TENS/EMS pain relief device can be powered by three AA batteries (not included) or connected via a USB cable for use. If for an extended period, please remove the batteries to prevent leakage and damage (remove batteries when using the USB cable).