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, perfectly matches your for 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 use ]HIGH-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 for Windows, Android, iMac, MacBook Pro, MacBook Air, MacBook, Surface Pro, Samsung Tablet PC Desktop laptop, etc.[ NOTE: The 10-key is NOT compatible with Chrome Book. And the "page up", "page down", "search", "screenshot" and "ins" key won't work with Mac OS, but other keys and number keys work well ]size:14.6x11.4x0.9cmMaterial:Aluminum alloycolour:SilverPackage Contents:1 * Bluetooth Number Pad1 * USB charging cableOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.