1. Aluminum shell, more rigid and durable (Can be used in old type rolling gate) 2. In store for power device: The operator can be controlled automatically or manually in case of power cut instead of connect an external clutch 3. Remote function: Automatic rolling code function, high confidentiality, long distance remote controlled, etc. 4. Auto-shuttering back the door against touching 5. Infrared detect (optional) *Aluminum shell, more rigid and durable (Can be used in old type rolling gate)In sets power device, current battery (4Ah/12V), mechanical location limitation, lifting weight up toweight 120kg. Automatic rolling code function, high confidentiality, long distance remote controlled. Auto-shuttering back the door against touching (Weight on 12KG)(AC220V, When power cut, the motor will turn to work in DC Power)