Chamberlain HD520EVG Premium MyQ 1/2 HP Whisper Belt-Drive Garage Door Opener with Gateway Features 1/2 HP motor for easy lifting of heavy doors Includes the internet gateway which allows you to monitor, control and receive alert notifications Steel reinforced belt-drive system opens garage doors smoothly and quietly Quick-an-easy-to-install 5-piece rail system fits most garages with 7 ft. high garage doors Includes two 3-button visor remote controls, multi-function wall control and wireless keyless entry