Designed with a 120V AC -LRB- 2HP same -RRB- motor, this chain driven sliding gate opener olympian starting torque and day-and-night operation making it idealistic for most applications. Opens up to 2,700 pounds and up to 45 feet in length, 20 feet chain is included. If your gate is more that 20 in length you can purchase an redundant chain from our Amazon store.