Functions & features:
1) manual release 2) machine core with compression spring, effectively avoids the accidents caused by spring breaking 3) die-casting aluminum alloy motor, precision and good at thermal radiating 4) motor cooling fan, solving the problem of heat-protection 5) double safety limit switches (photoelectricity limit switch/motor memory sensor) 6) reversing on obstacle 7) auto-closing 8) support the infrarer phtocell for anti-bumping function (optional) 9) support the external and internal vehicle loop detector (optional) 10) traffic light interface 11) wire control (switch signal)/ remote control (418mhz) 12) rs485 communication module (optional