Introduction 1.Type C USB charge, In-put: DC5V, 1A 2.Battery capacity:1800mAh 3.3 Seconds fast heating, temperature range is 50,55,60℃ 4.Intelligent Thermostat Control 5.3 Modes of vibration fucntion to choose, to relieve pain by vibration 6.3 Levels of heating function to choose 7.It needs 2 hours for full charge, uauslly can be used for about 2 hours 8.Easy to operate, one button for vibration, one button for heating 9.Smart,light and slim design, easy to carry, can use at anywhere   Feature 1. Relieve menstrual pain: Use the latest far-infrared heat and provide heat to the body. It can be safely and quickly heated in 3 seconds. Suitable for menstrual cramps, stomach cold, muscle soreness and other pain. 2. 3 adjustable modes: low / medium / high heat, to meet your different needs. The first level is 50 °C, suitable for daily warming, the second level is 55 ° C, normal menstrual care, and the third level is 60 ° C, relieve menstrual pain. 3. Fast heating and safety: Fast heats up to 50 °C in 3 seconds, so you don't have to wait. The temperature is controllable, it can be safely worn inside, and it is very thin and easy to carry. 4. Adjustable size: Elastic waistband design, flexible adjustable waistband for all body types, while being able to lock in the desired position for heating.