1. Small and portable, it does not take up space and can be carried with you 2. You can wear it easily in summer and winter, especially when you suffer from dysmenorrhea 3. It can also be used to keep warm and comfortable in the cold winter 4. Three levels of adjustable vibration, hot compress 5. Power supply: 5V1A 6. Lithium battery: 2000mhA 7. Charging time: 3-4 hours
