... heavy duty Fault auto-detect,swing away Free maintain Intelligent Automatic Boom BarrierDescriptions1) This boom barrier provides open/close time: ... -collision mechanism: need to buy extrally5) This boom barrier gate provides optional housing color as yellow (default),orange, white, ... makes Control Board water proof and dust proof, also protects operator.Specifications1) Power: AC 220±10%,50/60HZ, Max.0 ...