Logitech SIGNATURE K855 Wireless Mechanical TKL Keyboard Linear GrphiteSignature K855 provides the typing you love and the flexibility you need. With mechanical TTC Red (linear) Switches, you get fast and confident typing all day long. The easy grab design lets you easily move it around the desk with no wires in the way. A space saving compact tenkeyless design perfect for limited workspaces meets superior durability with a premium aluminium top case and mechanical switches that can withstand up to 50 million keystrokes.