Chamberlain 956D Mini Multi-Function 3-Button Remote Control Open and close 3 garage doors or gates, turn opener lights on/off, and/or turn on lights and small appliances in your home Convenient, small design Security+ rolling code technology that sends a brand new code every time it is used 5-Year 3-Volt battery is included Works with all "Security +" openers manufactured AFTER 01 June 2005. These are 315MHz openers and may be identified by their PURPLE 'learn' buttons.