The Green Lion Menstrual Heating Massager is the best choice for making comfortable moments during your period times. The close-fitting, long-lasting (1800 mAh) battery massager can work for 2 hours. You can heat up your body immediately in 3 seconds with the heating system that has been manufactured inside the product, and it will avoid any intrusion (using the noise reduction technology) while you are relaxing or working. You can control the temperature and check the battery on the digital display. Enjoy this menstrual heat massager to experience cozy days and feelings. Specification ? 2 hours Working time 3 Gear Temperature 1800mAh Battery 5V Rated voltage 3 Gear Vibration 3v Power Features Close-fitting & Comfortable Intelligent Noise Reduction Fast Heating in 3 Seconds Intelligent Digital Display