ALEKO AC1800 designed with a 120V AC (3/4HP equivalent) motor which provides exceptional starting torque and continuous operation, making it ideal for most applications. It opens gates weighing up to 1,800 lbs or 40 Ft in length with this chain driven sliding gate opener. This package contains a 20 ft chain and if your gates are more than 20 ft. in length you can purchase an extra chain from the "Chains" section).