Rotary cover: garage door keyboard, can be used in rain and other bad weather conditions, , not easy to damage, waterproof and dust-proof. Background lighting: The keyboard has background lighting for night use. Backlit keyboards make numbers easy to see even in the dark. General: Cooperate with most : , Lift Master, , Mechanical Master, Do It, , Genie Intellicode, Elevated Door, , Linear Muticode and other garage door openers with intelligent/learning button DIP switch. Please refer to our compatibility guide chart. Dual channel: Up to 2 garage door openers can be controlled, and each channel can independently control different receivers. You can set each channel as a different access PIN. Easy programming: through easy to follow wireless programming and common frequency identification of major of garage door opener, the setting can be completed in a few seconds. The easy to follow wireless program allows setup to be completed in seconds without the need for an electrical connection to the garage opening side., Manufacturer: Jnchdghwa