Relief Period Pain & Cramps: This heating pad could provided warmth to relief period pain in 7 seconds. To ensure your safety, it would automaticlly stop after working continuously for 30 minutes. Simply and Effective Button Control: Different from other confusing design, our period belt only have two buttons to provide simply and effective control. Only need a few clicking to start using If the battery is low, you will see a flashing light at the button. Thin and Lightweight Deign: Our menstrual heating pad is 30% lighter than many other similar heating pad. Its curved and thin design fit the body better, bringing more relaxation and comfort. Independent Heating and Massage Function: This period pain relief belt has heating and vibrating function which can work independently. You can always check the mode of the function by the screen. Rechargable & Portable, Use it anywhere: Only need 2 hours to reach full charge and it could work for up to 4 hours. It's cordless while using, which is portable enough to use it anywhere. We would answer customer problem in 24 hours, please feel free to contact us via Amazon.