USB-C quick charging: MX Mechanical keyboard stays powered up to 15 days on a full charge or up to 10 months with the backlighting turned off Multi-device, multi-OS: Pair MX Mechanical Bluetooth wireless keyboard with up to 3 devices on nearly any operating system via Bluetooth Low Energy or included Logi Bolt receiver Low-profile keys, more comfort: A keyboard layout designed for effortless precision, with a full-size form factor and low-profile mechanical switches for better ergonomics Smart illumination: Backlit keys light up the moment your hands approach the cordless keyboard and automatically adjust to suit changing lighting conditions Faster workflow, more customization: Customize Fn keys, assign backlighting effects, enable Flow cross-computer, multi-device control, and more in the improved Logi Options+ Fluid and quiet mechanical typing: MX Mechanical keyboard features Tactile Quiet switches that deliver next-level feel and flow with less noise Contains Recycled Content – See Specs for Details.