Garage door (section door) opener control system (Not include door board) Photoelectric sensor can be added Hand and remote control Enhanced Aluminium slot. CPU control and digital display position. Can add backup battery Low noise running Can enable alarm function Anti-adjust PLL lock frequency Superheterodyne receiver circuit. 433.92Mhz frequency, other frequency can be ordered. Built in MCU decoder and motor control circuit Remoter can be learn up to 31 pcs. 24V direct current motor Double side PCB, full SMT technology