chain drive door opener GS/CE/EMC/FCC approved Power supply: 220VAC 50Hz; 110VAC 60Hz Rated input power: 90W/120W Technical Parameter: Open and close force:600N,800N Decoding:rolling code Track length: 3.0M Technical Features: Light come on automatically for 3 minutes Automatic safety reverse,senses when someone or something is in the way In case of power failure,door can be released manually Soft start,Soft stop Chain drive, low noise Menu guide operation Photo Beam/wall switchs/backup battery can be added Outer packing: Package measurement: 84*30*24CM QTY loaded in a 20' / 40': 450/ 1000pcs..