... controll system Retractable Flap Barrier gate 1.Standard electrical interface 2. Over 10 years used lifes 3.RS485 connection 4, ... Tourism Sports,Exhibition, Swimming Hall,Residence Area,and so on 2. Functions& Features(1) Directional VFD Optical Signals----Green Arrow or Red ... built-in keys.(15) LED Counter, Direction indicator. (16) 2.4ghz wireless detector to sense the passing status. Flap Gate ...