Specification: 1. Automatic and Safety The rolling door is safety. The operator will stop if operating encounter resistance. 2. Fast and Quiet DC motor combines with interval design. Both sides of the door install hard-wearing nylon in order to increase the speed and prevent noise. 3. Attractive and durable The rolling door uses the special antirust technology. It is more durable and artistic. 4. Secure against Power Failure The door can switch into manual operation while losing electrical power. 5. Simple and easy setting The door has the patent for the speed location device, it is fast and convenient. 6. Add on Feature The rolling door system can combine with the central control system, electric eye, smoke detector, and siren.