The Compex Fuse combines the technology of a Lidocaine patch with a TENS e-stim devise, helping deliver effective pain relief in the targeted areas you need it most. Lidocaine is a numbing medication that desensitizes aggravated nerves by blocking the transmission of pain to the brain. The Compex TENS device stimulates the body's sensory receptors to help block and relieve pain. Recommended for anyone suffering from sore or aching muscles, chronic intractable pain, or arthritis. This lightweight and compact TENS devise was designed with travel in mind so you can easily use it where ever you go (gym, work, home airplane, school, office, etc) and can be easily recharged with the included USB cable. The LED interface and smart-touch buttons allow for easy and intuitive control. The TENS device features 6 modes of intensity, which can be adjusted on the TENS device.