... technique 3)good performance ITEM NO.300KG HH-AD24-300 Roll Up Garage Door OpenerMain specifications and technical parameter1.Environment air temperature ... machine state. Press stopped can unlock.3.Manual control functions: up, down, stop.4.Can add SAB SAE SAH allocation , realize ... Zone, Longwen District, Zhangzhou, Fujian, China. 300KG HH-AD24-300 Roll Up Garage Door Opener