This chain sliding gate opener has a 120V AC (1 1/2 HP equivalent) motor which provides an exceptional starting torque and continuous operation, making it ideal for most applications. Constructed with an aluminum alloy chassis, it's corrosion resistant and light enough for one person to carry and install. The heavy-duty motor supports gates weighing up to 2400 lbs (1100 kg) and up to 40 ft in length. The 20 ft gate chain is included. If your gates are more than 20 ft in length then you can purchase an extra chain in " Chains" section).