Description Using advanced technology, this gate opener will be automatically stop against extra resistancesand and is equiped with optional operation mode for single or dual wing to accommodate your needs. To enhance safety and convenience, there is an manual opening design so you will still be able to close the door in case of power failure. Feature T980 Rolling Swing Gate Opener 1. Soft start and slow stop 2. Automatically stop against extra resistances 3. Optional operation mode for single or dual wing 4. Avaliable for bluetooth / Mobile phone app control 5. Interface for card reader and underground detector 6. Large opening angle ï¼?180�° 7. Back-up power supply https://www.ossden.net/product/21.html