Product Name: Garage Door Opener Gdo1200 Model NO.: GDO1200 Brand: Hiland Electric Current Type: DC Driving Type: Electromechanical Structure: Straight Arm Item: Gdo1200 Working Voltage: 24V AC Temperature Range: -20-60c Code: Rolling Code Trademark: Hiland Transport Package: Each in Individual White Box Specification: GDO1200 Origin: China Product Description I , FunctionMicro intellectual control -- One button to control open, stop and close.The light is on while opening or closing the door,three minutes later the light is off automatically. The unit running is controlled by computer program. Test the force of open or close the door, the optional function is photo beam, auto-close, lock door, etc. The door pauses momentarily then rebounds when it reaches the hinders on the closing way. The protecting functions are overload, over hot or low power input, etc.DC motor -- Low noise, soft start, slow stopping to protect the unit and make sure it can be used for a long time.LED display -- Working situation can be shown on the LED screen.Decoding -- Rolling code.Manual Disengagement-- Open and close the door by hand without power.Optional Functions-- Photo beam, battery backup and wall button.II,Technical parameters