1、powerful function:intellectual type rate open-close type
2、small size：Only 35% of other products
3、light weight：Only 30% of other products
4、reliability：bearings and electric components used are made by famous maker in the
international market
5、good looking：adc body and cover，fine and smooth
6、high strength：worm wheel and output shaft is made of sped alloy
7、no backlash：worm wheel and output shaft come one pieces
8、safety：AC1500(V) test，sped made cord lock
9、simple：one phase power supply wiring is very simple