[Widely Compatible]: The numeric keypad includes frequently used shortcut keys, widely compatible with your computer or laptop, Windows, Android, , Pro, Air, , Surface Pro, Tablet PC Desktop laptop, etc. No delays and dropped calls, providing you with a fast and stable wireless technology lifestyle. (NOTE: 10 keys are not compatible with ChromeBook.<br />"Page Up", "Page Down", "Search", "Screenshot" and "" keys will not work with OS, but other keys and number keys works fine).<br />[Built-in -capacity rechargeable safe lithium polymer battery]Number keypad built-in 500mAh -capacity lithium battery, fully can work continuously for 260 hours without backlight. Auto Sleep Function: The bluetooth numeric keypad will automatically enter sleep mode after 40 minutes of inactivity to save power and energy. Press any key to wake up the keyboard within 3 seconds.<br />[Backlit Bluetooth Numeric Keypad]: The backlit keys are suitable for any lighting environment, the Bluetooth numeric keypad has 7 colors and 3 levels of brightness, allowing you to type during the day or at night. Backlit shortcut keys ("Esc" + keys) allow you to manually adjust the color and brightness of the keys.<br />[Slim Aluminum Design & Ergonomic Tilt]: The wireless number pad is made of strong and high-quality aluminum material, which is durable. Ergonomic tilt, comfortable typing Precise control, good elastic quick response, comfortable typing and nice, slim appearance, only 0.27 lbs (126g), 5.7 x 4.5 x 0.35 inches. Perfect match for your Air / Pro, , PC, Surface Pro, laptop or desktop as a side external numeric keypad.<br /><br />Color: Black<br />Material: aluminum alloy + ABS<br /><br />Package Contents:<br />1 x Numeric Keypad<br /><br />Only the above package content, other products are not included.<br />Note: Light reflection 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.