Dual Mode - Bluetooth 5.1 & USB Wireless Connectivity: The numeric keypad supports Bluetooth and wireless USB connection at the same time. You only need to short press Fn + “BT” or “2.4G” button to switch seamless between different channel. | Wide Compatibility: The keypad is compatible with both Windows, MacOS, iOS devices. The dual mode features allow you connect the keypad to your tablets, phones, PC computers, laptops and macbooks. To configure the keypad to specific OS you need to short press Fn + “MAC” or “WIN” buttons. | Familiar Number Configuration for Efficiency: Forget hunting through a full row of numbers on no numpad keyboards. This keypad is a must-have for those who needs intense data input but is not used to typing with that kind of keyboards. | Backlit Keys for Any Lighting Environment: The keyboard with 7 colors and 3 levels of brightness allow you to type day or night. The backlit shortcut keys (“Fn” + the arrow keys) allow you to manually adjust the color and brightness of the keys. | Portable and Sturdy: Type wherever you like thanks to the slim and portable design (195g weight; 143mm*118mm*14mm). It also built with the high quality of ABS material that keeps it from falling and scratching. | Long Lasting Rechargeable Battery: It can work up to 220 hours without backlighting thanks to auto-sleep power saving mode and an/off switch button. Note: The battery life may vary based on use and computing conditions.