Chamberlain PD612EV Garage Door Opener, 1/2 HP, Durable Chain Drive Operation, MyQ Smartphone Control Enabled (Internet Gateway Sold Separately), Includes 2-3 Button Remotes, Keyless Entry Keypad, Multi-Function Wall Control Panel Myq Smartphone Enabled. Radio Frequencies-310, 315, 390, Max Door height- 7 ft, Minimum ceiling clearance- 4 in 200w Of Light Turn On Automatically When Garage Door Opens For Added Safety (bulbs Sold Separately) Smartphone Monitoring & Control With Myq Gateway (sold Separately) Durable 1/2hp Motor & Chain Drive Provide Continual, Steady Performance Home link-compatible In-vehicle Control System Durable 1/2hp motor and chain drive system provides continual, steady performance. MyQ technology enables you to monitor, open and close your garage door from a smartphone (Internet Gateway CIGBU required and sold separately). Allows for up to 200-watts of lighting for added safety and is CFL compatible. Compatibility Bridge (not included) necessary for certain vehicles. Quick-an-easy-to-install 5-piece rail system fits most garages with 7 foot high garage doors. 8 foot and 10 foot rail extensions kits sold separately. HomeLink compatible, works with the in-vehicle remote control system built into most cars. Includes two 3-button visor remote controls, multi-function wall control and wireless keyless entry system.