The Beurer Menstrual Relax! The pad with separately adjustable heat and TENS function can help bring relief and relaxation; thanks to the rechargeable batteries and 15 TENS intensity levels you can decide for yourself when and where to use your helper! The Menstrual Relax is a self-adhesive TENS device with a heat function to provide pain relief for menstrual discomfort and pain caused by endometriosis.