Logitech SIGNATURE K855 Mechanical Wireless Keyboard Graphite Dimensions Height: 138.8 mm Width: 355.2 mm Depth: 38.8 mm Weight (with batteries): 692.4 g Technical Specifications Keyboard Connection Type: Bluetooth Low Energy Wireless (Bluetooth 5.1) Wireless range: 10 m 1Wireless range may vary based on user, environmental, and computing conditions. Mechanical switches: Red (linear) Easy-Switch: Connect up to three devices and easily switch between them Battery life: up to 36 months 2Battery life may vary based on use and computing conditions. Indicator lights: on Caps Lock, Easy-Switch keys and Battery. Optional software: Supported by Logitech Options+ on macOS 10.15 or later and Windows® 10, Windows 11 or later Customization app Supported by Logi Options+ on Windows and macOS, Compatible with Logitech Flow technology-enabled mouse 3Requires Logi Options+ app available on Windows and macOS at logitech.com/optionsplus Logitech Flow Compatible with Logitech Flow-enabled mouse Sustainability Graphite plastics: 52% post-consumer recycled material 4Excludes receiver, printed wiring assembly (PWA), and packaging Off-white plastics: 40% post-consumer recycled material 5Excludes receiver, printed wiring assembly (PWA), and packaging Blue plastics: 36% post-consumer recycled material 6Excludes receiver, printed wiring assembly (PWA), and packaging Rose plastics: 38% post-consumer recycled material 7Excludes receiver, printed wiring assembly (PWA), and packaging Topcase: Low carbon aluminium Paper Packaging: FSC™-certified Certified carbon neutral Warranty Information 1-Year Limited Hardware Warranty