Chamberlain 1.25-HP Whisper Drive Belt Drive Garage Door Opener with MyQ and Wi-Fi Compatibility and Battery Back-Up Chamberlain garage door opener features a 1.25-HP motor with Whisper Belt Drive system for quieter, smoother operation, making it ideal for homes with sleeping spaces above or adjacent to the garage Safety feature includes MyQ smart phone with Internet Gateway, allowing you to monitor and control your garage door from anywhere for peace of mind Accessories include two 3-button remotes, wireless keypad, safety sensors, push-button wall control with light switch that detects motion with an LCD display for time, temperature and diagnostic information Light illuminates garage with two 100-watt bulbs for increased safety and security (bulbs sold separately) HomeLink compatibility allows you to open and close the garage door from your car (certain vehicles may require a compatibility bridge device to operate HomeLink) 5-piece rail system is easy to install and fits most garages with 7-ft H garage doors (extension kits required for 8-ft or 10-ft H garage doors, sold separately) Limited lifetime warranty gives you peace of mind Internet Gateway opener connects to your home's Wi-Fi network to provide smart phone control without the purchase of additional hardware Battery backup feature provides normal use of the garage door opener, even during a power outage