The circular concave keys are shaped to fit the fingertips, and their rounded edges provide a pleasant typing experience with every keystroke. The increased key stability reduces typing noise and optimizes responsiveness, allowing you to feel each keystroke without having to hear it. The detachable wrist rest offers comfort throughout the day with its stable surface and smooth texture. The MX Keys Plus features hand proximity sensors to activate the backlighting, as well as ambient light sensors to automatically adjust the backlight. Additionally, the MX Keys Plus can be connected to up to three devices via the Unifying receiver or Bluetooth Low Energy technology, and the Easy-Switch keys allow for simple, seamless switching between devices.