Perfect Stroke keys Designed for creatives and engineered for coders, the Logitech MX Keys Wireless Keyboard has been crafted for support, stability, and precision. The quiet and fluid but fast and accurate keystrokes deliver a distinct tactile response. You'll feel the response as you type rather than hear it. Adjustable backlighting The backlit keys use a proximity sensor to detect when you're about to type and fade off when you leave the desk. Backlighting intensity automatically adapts to the room or can be set manually. Logitech Flow Working with your MX Master 3 or other Logitech Flow-enabled mouse, you can move from one device to another without re-connecting. Transfer files, documents, and images across computers and systems with ease. Experience 10 days of battery life with backlighting or up to 5 months charge with the backlighting off. And when you're low on power, USB Type-C charging will have you up and running in no time.