1. Electric roll film is used DC24V safety voltage, with the control box transformer, to avoid electric shock accident.

2.Internal gear with helical gear plus planetary gear combination, transmission efficiency, the key gear made of special steel, carburizing heat treatment, high surface hardness, more wear-resistant.

3. Double gear plus planetary gear self-locking, when stopped will not automatically fall.

4.Adjust the travel limit convenient, do not need other tools to help,conducive to high-altitude operation,and with a light, easy to confirm the status of the power and operating conditions.

5.Use rubber cork gaskets,prevent aging, effectively prevent rain infiltration.

6.Power failure can achieve external drive.