HIKVISION DS-TMG4B0 4 Series Straight-Arm AC Barrier GateHand wheel on motor design. When power fails, rotate the hand wheel to raise or lower the pole. Three buttons to control the boom pole to rise, fall, or stop. Contactless monitoring with more accurate control and more stable running. Multiple interfaces, connectable to IR cable (low level signal input), induction, and toll connection system. Simple wiring. No need to arrange or distribute cables. Wireless remote control via 430. 5 MHz remote