Dell KM7120W: Seamlessly connect to three PCs. The two Bluetooth 5.0 and 2.4GHz wireless connection methods allow you to switch easily across your laptop, desktop or 2-in-1 with a click of a button With 36 months of battery life, it lasts 3 times longer than its previous generation. Now you do not have to be concerned with frequent battery replacements. Tilt the keyboard to your desired angle to type comfortably—program shortcuts for your keyboard and mouse for quick navigation to your preferred applications. The intuitive positioning makes them easy to access every time. Instantly pair each device with your compatible Windows 10 system via Bluetooth without having to configure in Settings every time with Microsoft Swift Pairi. Compatibility with Windows, Chrome, Android and Mac provide maximum flexibility across all your devices. Rapid responses via the 1600 DPI sensor help you navigate effortlessly, especially across your high-resolution 4K screen. Its optical sensor offers accurate tracking and is ideal for use on most desk surfaces. Dell?s Advanced Exchange Service ships you a replacement combo the next business day so your work is uninterrupted. Rigorous testing ensures that the combo works perfectly with your Dell system.