SLIM ALUMINUM DESIGN: Bluetooth number pad is constructed of solid and premium aluminum materials for long-lasting use, the ergonomic tilt for comfortable typing and good look, slim style appearance ( Only 0.46lb, 5.7*4.4*0.47 inch ), perfectly matches your Macbook, MacBook Air / Pro, iMac, PC, surface pro, laptop or desktop as the side external numeric keypad.BLUETOOTH 3.0 CONNECTION: Bluetooth 3.0 technology provides a cable-free & clutter-free connection, the external 34-keys full keypad extends your existing keyboard, operating distance 10m. NOTE: For Laptop Desktop PC without Bluetooth function, you need to use third-party Bluetooth adapter (not included) before useHIGH-CAPACITY RECHARGEABLE BATTERY: Built-in 160mAh lithium rechargeable battery. The Bluetooth numeric keypad is easily recharged through the included USB cable, no need to change the battery and user- friendly. The Bluetooth wireless keypad also has the auto sleep function, lower power consumption, reflect energy saving and humanization of the product. Press any key can wake up the keypad within 3 seconds.WIDELY COMPATIBLE: This Bluetooth wireless number pad it includes shortcut keys and low profile quiet 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: The 10-key is NOT compatible with ChromeBook. And the "page up", "page down", "search", "screenshot" and "ins" key won't work with Mac OS, but other keys and number keys work wellPackage included:1 Pack