Rolling door opener is designed to suit most types of residential rolling garage doors equipped with balance spring settings.It may be fitted to either single or double width doors up to 3 meters high and 5.5 meters wide. It offers convenience,safety and security for your garage door. **************************************************** Technical Specifications Power Supply:220+/-10%,50Hz Rated Power:100W Rated Load:25kg Roller Diameter:270mm Roller Revolution:3.5rpm Lift height:3m Motor Weight:7.5kg ************************************************** Features 1,Remote Control. 2,Automatic Reversing System. 3,Courtesy Light. 4,Easy Manual Disengagement Pull Cord. 5,Auto Close Mode 6,Safety Infrared Beam. 7,Open and Close Buttons. 8,Auto Run Time. 9,CAS(Color Assisted Settings)System.