ALEKO AC1800NOR Chain Driven Sliding Gate Opener for Gates up to 50 Feet Long 1800 Pounds Chain driven sliding gate can be used to open gates up to 1,800 pounds of 50 feet in length User programmable and user erasable remote codes; supports up to 100 remotes on its own, or more with the use of an external receiver that is sold separately Aluminum alloy chassis is corrosion resistant while still being light enough for 1 person to carry For your safety, this model will stop and reverse if encounters an obstruction on closing or opening Includes (1) AC 110V motor, 20 feet of chain, and (2) remotes and all needed installation hardware