Features: Function: After using our electric heating pad, can effectively relieve your physical discomfort, such as abdomen pain, menstrual pain and waist pain. It is very necessary for girls and women with menstrual cramps. 3 Levels Heat Temperature & Vibration: There are 3 temperatures, 113 ,131 and 149 or 45,55 and 65 and 3 levels high-frequency vibration massage modes. You can choose the best one mode as your needs. Wide Usage: You can use the menstrual heating pad in different scenarios, whether you are taking a break, reading, driving or working, it will not affect you too much. Wireless & Portable: This wireless portable heating pad uses USB charging which is more convenient for you to use in office, home and school. 2 Colors: There are 2 colors for you to choose, white and pink. You can choose the color what you like. Adjustable Belt: The belt can be adjusted according everyone's waist circumference easily. Specifications: Material: PC Color: White / Pink (Optional) Built-in Battery: 5V 1800mAh Built-in Lithium Battery Item Size: 18 * 8.5 * 2.5cm / 7 * 3.3 * 1in Item Weight: 157g / 5.4oz Package Size: 22 * 12 * 6cm / 8.7 * 4.7 * 2.4in Package Weight: 269g / 9.5oz Package List: 1 * Menstrual Heating Pad 1 * USB Cable 1 * User Manual