Logitech K400 Wireless Keyboard Keyboard Built-in Trackpad (compact 3.5 inch) Model: 920-003070 Color: Black Connects via a USB connector that you plug into your Mac or computer or device. Plug and play connectivity for immediate use. Dimensions: 13.9” L * 5.5” W * 1” D Operating System Compatibility: Google Chrome OS Connectivity: USB Up to 33’ wireless range Compatible with Windows and Mac. It says system requirements are for Windows. But I used it for my 2009 iMac and it worked the same. Only difference was (for Mac users) there is no “command” button. But the “control” button on this works the same way. No problems at all. Works like new. If pickup, feel free to try it out for yourself at time of sale. Takes 2 double aa batteries. Will replace with new batteries before sold. Had it for 6 months and still haven’t had to change the batteries. The original listing from brand claims the batteries should last you one year before needing to replace them. Link from Logitech website for more info. {url removed}