1. Aluminum alloy shell, mechanism limit switch
2. Suitable to automate existing rolling door, easy installation and maintenance
3. Standby battery allows you to open or close door in case of power failure
4. Turn on control box light automatically when you enter a dark room---hands free
5. Suitable for tubes of 60mm (2″) and 25.4mm (1″)
6. Terminal connections for infrared beam protector and alarm horn
7. 433Hz frequency rolling code remote control is with more than 50m effective distance in open area
8. I.D: 60mm O.D: 22cm
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