New and unopened! Logitech MK850 Performance Wireless Keyboard and Mouse Combo Features & details Contoured right-handed mouse with hyper-fast scroll wheel enables you to fly through documents and web pages Type quietly and comfortably for hours at your desk on a full-size keyboard with cushioned palm rest And carefully-crafted keys Both keyboard and Mouse are fully multi-device and multi-os friendly for powering through projects Start typing on your computer, then switch and Type on your tablet, phone or on a second computer Features optical 1000 DPI resolution for silky prominent movement Built-in 8-Buttons and scrolling wheel for fast page navigation and handy control over browsers' Tabs Offers plug and play interface Chrome OS Usb wireless Bluetooth/RF USB wireless Bluetooth/RF Optical - 1000 dpi - 8 button - scroll wheel - AAA, AA - Compatible with desktop computer, smartphone, notebook, tablet (Chrome OS, Windows, Android, Mac, iOS)