Slim Aluminum Design & Ergonomic Tilt:The Wireless Number Pad is made of solid and premium aluminum materials for long-lasting use. The ergonomic tilt ,comfortable typing precise control, good resilience fast response for comfortable typing and good look, slim style appearance ,only 0.45lb, 5.6*4.3*0.46 inch. Built-in High-Capacity Rechargeable and safe lithium polymer batteryThe number keypad built-in two high-capacity lithium batteries with 110mAh, the standby time of the keypad is up to 45 hours when fully charged. (One Micro USB charging cable will come with the keypad). Auto sleep functionThe Bluetooth numeric keyboard will automatically enter sleep mode after 40 minutes of inactivity to save power and energy. Press any key can wake up the keypad within 3 seconds.Tip!: The hibernation of the computer will cause the keyboard to enter the hibernation mode, after starting the computer and waiting for 3 seconds, the product can be used normally. Wireless Bluetooth 3.0 Connection: Using the advanced Bluetooth 3.0 chip, strong Anti-interference ability make the numeric keypad is very easy to pair with your computer, provides you a fast and stable wireless technology lifestyle.Tip!: For Laptop Desktop PC without Bluetooth function, you need to use third-party Bluetooth adapter (not included) before use Widely Compatible: The number pad includes commonly used shortcuts, widely compatible with Mac OS 10.0 above, IOS 9.2 and above, Window 7/ 8/ 10 above, Android, works with your iMac, MacBook Air, MacBook Pro, MacBook Mac Mini( Also compatible with the Bluetooth-enabled notebook,laptop and smartphones with Windows 10/ 8/ 7 ).Tips!: In order to maintain wide device compatibility, the shortcut function keys of this keyboard cannot be customized. 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 well ; Calculate key need to manually open the calculator program on iMac and MacBook ,then input the number on keypad to run the calculate function. Every HoRiMe Bluetooth number pad will go through a strict quality test process before sending out, as we promised to bring the best quality Bluetooth keypad to our customer. Best Gift for Thanksgiving Day,Christmas,New Year.