Features: 1. This swing door opener will stop acting when gate meet with obstacle. 2. Release unit in case of power failure 3. Controlling single or double-leaf is optional. 4.24VDC back-up battery can be input. 5. One control unit for two motors, control panel are available to photocells, loop detecor, IC card reader & alarm lamp. 6. Newly updated with much more easily and intelligent limit ways.