... is adjustable 3. heavy duty Automatic Boom barrier:Applications:parking lot, toll gate, goods yard, railway crossing, commercial premise, apartment block ... signal)/remote control (418MHz)RS485 communication module (optional)Technical data:Running time: 1, 3, and 6sBoom type: straightMaximum boom length: 3 ... 75 degree CelsiusProtection grade: IP44 Automatic Boom barrier for parking lot and toll system