Using a combination of non-invasive TENS electrostimulation and soothing warmth, the EM50 from Beurer can relieve menstrual pain without the need for medication. With 15 intensity settings, it works by sending mild electrical impulses to block pain messages sent to the brain while the additional heat function helps encourage cramping abdominal muscles to relax. After a soothing 20-minute session, the pad will automatically switch off. When the battery runs low, an indicator light will display, and you can recharge using the included USB charging cable.