Chamberlain 0.5-HP My Q Smart Chain Drive Garage Door Opener with MyQ and Wi-Fi Compatibility and Battery Back-UpMonitor and control your garage door from anywhere with MyQ Access your garage door even during power outages Know youre safe while meeting requirements of California SB 969 Lifting force equivalent to 1 2 HP Fits garage doors up to seven feet high Box includes 3 button remote, wall control and safety sensors Six year motor warranty; one year chain warranty Features Series Name My Q Horsepower 0. 5 Horsepower Rating 1 2 HP Drive System Chain Number of