BLUETOOTH 3.0 CONNECTION: Bluetooth 3.0 technology provides a cable-free and clutter-free connection, a full 10-key external keyboard extends your existing keyboard, 10m operating distance. No USB dongle is needed. NOTE: For desktop laptops without Bluetooth function, you need to use a third-party Bluetooth adapter (not included) before use. 28 full-size keys with num lock, delete, tab and more, use the wireless keyboard with 28 function keys including backspace, start, end, tab and more to help with accounting tasks, spreadsheets Excel and much more to expand your existing keyboard. /p> COMPATIBILITY: Widely compatible with Windows 2000/Me/98/XP/Vista/7/8/10, Android, Surface Pro 3, Pro 4, Android Cellphone Tablet PC Laptop Desktop, etc. NOTE: This Bluetooth number pad is NOT compatible with ChromeBook. And on Macbook OS system and Apple iPad iPhone iOS system, the calculator key and function keys can't work, but other number keys and ESC, tab symbols work well: comfortable typing precise control, Good resilience, fast response and reduced press noise, provides quiet operation and long service life. The slim design allows you to take the keyboard anywhere ERGONOMIC AND ENERGY SAVING: This Lekvey Acedada Bluetooth digital keyboard on the back provides optimal comfort and securely holds the Bluetooth numeric keypad in place. . It will go into automatic power saving mode when not used for 15 minutes, press any key to wake it up within 3 seconds >