แขนกั้นรถยนต์ อัตโนมัติ Functions & Features: 1. Manual release device to operate the barrier when power failure 2. Barrier motor with die-casting aluminum alloy is high-hermetic and easy for heat dissipation 3. Motor cooling fan to avoid the over-heating possibility 4. Automatic reversing when the barrier boom meets the obstruction 5. Auto closing realization through menu setting on the control panel 6. The barrier works well with infrared photocells, loop detectors, card readers, ticket dispensers, manual switch(wire control), traffic light 7. RS485 Communication Module is compatible