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. KEY FEATURES: ‣ Features an optional heat function to further relax muscles and soothe cramps. ‣ Features 15 intensity levels to personalize your pain relief experience. ‣ Convenient for on-the-go use with a long-lasting battery and compact design. ‣ Slim, lightweight design with self-adhesive pads allows for comfortable wear under clothing. SPECIFICATIONS: ‣ Timer - Auto-shut off after 20 minutes ‣ Power Source - Rechargeable battery ‣ Battery - 320 mAh