PRODUCT OVERVIEWThe SYSLM4 magnetic loop, together with metal mass detector model FJCD621, is a security device that prevents the barrier arm from going down if a vehicle is beneath it. It also sends the order to close the barrier once the vehicle has passed.PRODUCT TYPEAccess ControlKEY FEATURES Magnetic Mass Detection for Enhanced Vehicle Security Prevents Barrier Arm From Lowering on Vehicles Sends Close Command After Vehicle Passage Compatible With Standard Cars and Pickup Trucks Works With SYS and XB Series Detection Systems Quick Installation and Adjustable for Various Spaces TECHNICAL SPECIFICATIONS Brand: Accesspro Model: SYS-LM4 Product Type: Networking Accessories Magnetic Mass Detection for Enhanced Vehicle Security Prevents Barrier Arm From Lowering on Vehicles Sends Close Command After Vehicle Passage Compatible With Standard Cars and Pickup Trucks Works With SYS and XB Series Detection Systems Quick Installation and Adjustable for Various Spaces INTENDED USE / APPLICATIONS Professional networking and communications deployments Commercial, institutional, or industrial installations Use with compatible equipment according to manufacturer specifications