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 (photoelectricity 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): 101 Running time: 1s, 3s, 6s Boom type: straight Max boom length:3m, 4.5m, 6m Boom dimension (wßh): 45ß80mm Boom weight: 3kg, 4.5kg, 6kg Voltage: 220v a 10%ú¼ 110v a 10% Frequency: 50/60hz Motor voltage: 220v Power: 120w Working temperature: -20~75