Ergonomic belt with a transcutaneous electrical nerve stimulation (TENS) device provides soothing electrical impulses to your lower back Four wear-free contact electrodes are made of conductive carbon material Water-contact electrodes require no gel or replacements for ease of use 140cm waist circumference and an included extension strap accommodate a wide range of body types Four pre-programmed applications and adjustable intensity allow you to customise your session Removable operating element features an LCD display Countdown timer, safety switch-off, and low-battery indicator make operation effortless