Compatible devices Laptop, PC, Tablet Bluetooth connectivity technology Ergonomic keyboard Special feature Ergonomic, Rechargeable Bluetooth color - Black Operating system Windows, Mac os, IOS, Android Number of keys 34 Item dimensions LxWxH 5.7 x 3.4 x 0.36 inches Material Aluminum about this item ?THIN ALUMINUM DESIGN? : Lekvey Bluetooth number pad is made from strong and premium aluminum materials for durable use, ergonomic tilt for comfortable typing and beautiful appearance, slim style appearance (only 0.46 lbs, 5, 7 * 4.4 * 0.47 inch), perfectly matches your Macbook, MacBook Air/Pro, iMac, PC, surface pro, laptop or desktop as a side external numeric keypad. ?BLUETOOTH 3.0 CONNECTION? : Bluetooth 3.0 technology provides a wireless and cable-free connection; Clutter-free connection, external 34-key full keyboard extends your existing keyboard, 10m operating distance. NOTE?: For desktop laptops without Bluetooth function, you need to use a third-party Bluetooth adapter (not included ) before use ?HIGH CAPACITY RECHARGEABLE BATTERY?:?Built-in 160mAh rechargeable lithium battery. The Bluetooth number keyboard is easily recharged via the included USB cable, no need to change the battery and user-friendly . The Bluetooth wireless keyboard also has the automatic sleep function, lower power consumption, reflects the energy saving and humanization of the product. Press any key to wake up the keyboard in 3 seconds. ?WIDELY COMPATIBLE?: This Bluetooth wireless number pad features shortcut keys and quiet, low-profile scissor switch keys so you can work comfortably on your computer or laptop. Compatible with Windows, Android, iMac, MacBook Pro, MacBook Air, MacBook, Surface Pro, Tablet PC Desktop Laptop, etc. NOTE: 10 key is NOT compatible with ChromeBook. And the Page up, page down, search, screenshot and ins keys will not work with Mac OS, but other keys and number keys work fine