EM 50 Menstrual Relax uses transcutaneous electrical nerve stimulation (TENS) to reduce menstrual cramps or the pain caused by endometriosis with 15 levels of intensity. The integrated heat function can be used in combination with TENS or separately. Its flexible material is pleasant on the skin and its discreet, flat construction allows the pad to be worn underneath the clothing at home or on the go. An LED display at the front indicates which function is activated.