1. 5V low voltage and safe item.
2. Make warm within 20 seconds. 10 minutes to highest temperature (45-50)
3. Japanese hot fabric, high heat transfer rate, high temperature and pressure resistance,water proof.
4. 2.5W low power, 1kilowatt-hour/25days.
5. Translucence shell,it can become colorful light when work.
6. Switch available.
7. 1.5m usb cable
8. 1 year warranty