New update:This menstrual pain relief heating pad contains too many black technologies. Graphene heating, it is safe, healthy and effective. Induction touch switch and magnetic attraction charging make it more convenient and interesting. It has three heating modes and three vibration massage modes. 3 Sufficient heat temperatures: Quickly double touch the heating switch, after three seconds it will heat up. There are 3 temperatures, 113 ,131 and 149 (45,55 and 65). Touch the switch again to adjust the temperature. High-frequency vibration massage: There are three high-frequency vibration massage modes (3000,4500 and 6000 vibrations/Min.), No interval, short interval and long interval vibration. Touch the switch to adjust vibration massage modes, choose one you like best. Internal battery: Compare with last generation menstrual pain relief device, this device adopts internal battery. It is more convenient to carry and use. Charging it for about 5 hours to full power. Note: Device x1; Charging cable x1; English user manual x1; Safe Design. This device would shut down automatically after about 30 Minutes constantly working. If you want to continue using it, just turn it on again. Besides, this device will make too much heating. We suggest, put a piece cloth between device and your belly.