... available in open and close 2, Single Track / DoubleTracks and Trackless Electric Retractable Gate -- HuangZhe1Y--Pictures:Electric Retractable Gate -- HuangZhe1Y--Specifications ... degree then the clutch will keep apart, and now the gate can be manually opened3, Infrared Anti-Collision ... Control; Easy operation of opening gate and distance is less than 50m6, Drive and Driven Wheel: With die-casting ...