2. Double insulation protection. 
3. The electrical contact with silver alloy contact, good contacts.
4. High temperature resistant nylon shell, better moisture-proof insulation performance and the high life quality ac motor drive blades. 
5.  The iron shell is chromed or spraying processed, so it has bright appearance and good corrosion resistance. 
6. Equipped with hot, cold wind and multi-function machine. 
The optimal characteristics: 
Super-silent design, to avoid noise pollution (silent and not on the surface of a small, light, but the wind blow out very concentrated, the voice is not sharp).