Can control by three position switch or by remote control unit, operate ‘OPEN’, ‘CLOSE’ and ‘STOP’. Machine core with compression spring, effectively avoids the accidents caused by spring breaking. Motor cooling fan, solving the problem of heat-protection. Double safety limit switches (Optional). Auto Close function. Manual Release. Duty Cycle 100%. Support the external and internal Loop Detector (Optional). Traffic Light interface. (Optional). Wire control (switch signal)\ Remote control ( upto25m). Compatible with Weigand and RFID Readers. Compatible with bio-metric. Die-casting aluminum alloy motor, precision and good at thermal radiating. Support the infrared photocell for anti-bumping function (optional).