Logitech K855 Wireless Mechanical Tenkeyless Linear Keyboard, Graphite Logitech K855 Wireless Mechanical TKL Keyboard Gear Studio PC Logitech Signature K855 Wireless Mechanical TKL Keyboard Blue Grey Buy Logitech Signature K855 TKL Wireless Keyboard Graphite [920 011074 Logitech Signature K855 Wireless Mechanical TKL Keyboard Blue Grey. Signature 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. Key Features Mechanical TTC Red (linear) switches for fast and confident typing all day long No wires via Logi Bolt USB or Bluetooth low energy Easy Switch keys make it easy to connect up to three devices Compact tenkeyless design Aluminium top case Durable switches for up to 50 million keystrokes Multi OS compatibility Whats In the Box Wireless Mechanical Keyboard2 AAA batteries (pre installed)Logi Bolt USB ReceiverUser documentation (1) Battery life may vary based on user and computing conditions (2) Logi Options+ software available only on Windows 10 and macOS 10. 15 or later