Using German style door opener, chain driving, auto-caging, slowly and smoothly opening/closing/stopping. The door can auto-return to open when it meets obstacle with over 15 kg resistances during the door closing. Up slide opening, 5 minutes time lapse turned off Light System, emergency Switch Equipped clutch, it can be manual opened/closed when there is no power supply or at other emergency circumstances. Remote controlled (Adopting the remote controller with customized hopping code IC of exclusive address code) . The remote controlled distance is over 20 meters at all weather circumstances.