... This boom barrier is Inclusive of arm and "push button" which opens/closes barrier4) This barrier is exclusive of ... AC220V/0.5A, DV 12V/1A8) Wireless remoter(optional): two button remote transmitter, distance>20m9) RS 485 interface: 9600bps, ASCII ... barrier provides a scure and convenient solution in shopping center, exhibition center, hospitals, airports etc, apartment blcok access,commercial premise ...