1. With the best thermal conductivity material aluminum shell 2. Built in battery special lithium ion battery 3. Charging time for about 2 hours 4. Standard at use time 4 hours 5. Surface temperature about 40 degree Celsius 6. With thermostatic controller inside 7. Can be recharged to use more than 500 times 8. Super slim and super light design 8.5mm thick 9. Content of set Main body, USB charging cable and special case 10. Five kind of colors may selected.