1. Functions & features 1) manual release 2) machine core with compression spring, effectively avoids the accidents caused by spring breaking 3) die-casting aluminum alloy motor, precision and good at thermal radiating 4) motor cooling fan, solving the problem of heat-protection 5) double safety limit switches (photo electricity limit switch/motor memory sensor) 6) reversing on obstacle 7) auto-closing 8) support the infrarer phtocell for anti-bumping function (optional) 9) support the external and internal vehicle loop detector (optional) 10) traffic light interface 11) wire control (switch signal)/ remote control (418mhz) 12) rs485 communication module (optional). 2. Technical data Mode(wjdz): 102 Running time: 1s, 3s, 6s Boom type: straight Max boom length:3m, 4.5m, 6m Boom dimension (wíßh): 45íß80mm Boom weight: 3kg, 4.5kg, 6kg Voltage: 220v ía 10%ú¼ 110v ía 10% Frequency: 50/60hz Motor voltage: 220v Power: 120w Working temperature: íí-20íµ~75íµ