Chamberlain PD752D 3/4-Horsepower Heavy-Duty Premium Chain Drive Garage Door Opener 3/4-horsepower chain drive is strong enough to lift even the heaviest garage doors Quick Connect terminals enable easy installation of the Protector System and door control wires Quick-Install 5-piece rail system Garage door opener lights turn on anytime the Protector System beam is obstructed Includes limited- lifetime motor warranty