<p>MX Keys for Business<br><br>• Rechargeable Li-Po (1500 mAh) battery<br><br>• Keyboard functions: Integrated numpad, arrow keys, microphone mute, talk-to-text and other customizable F-Keys, battery indicator, Caps Lock indicator 1Microphone mute, talk-to-text and other customizable F-keys require Logi Options+ app available on Windows and macOS at logitech.com/optionsplus. Video conferencing app cannot be running in the background. Dictation feature is provided by Windows and macOS and currently available only in select languages and geographies.<br><br>• Smart backlighting: Hand proximity sensors turn the backlighting on. Ambient light sensors adjust backlight brightness<br><br>---<br><br>MX Master 3S for Business<br><br>• Rechargeable Li-Po (500 mAh) battery<br><br>• Sensor Technology: Darkfield high precision<br><br>• Buttons: 7 buttons (Left/Right-click, Back/Forward, App-Switch, Wheel mode-shift, Middle click), Scroll Wheel, Thumbwheel, Gesture button</p> <p>• Warranty Information: 2-Years Limited Hardware Warranty</p> <p>Store in a cool dry place</p> <p>China</p>