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About K400 Plus

Wireless Touch Keyboard K400 Plus is a full size keyboard layout and touchpad in a compact size.

Incurve keys are ideal for touch typists and the soft key stroke makes this a quiet keyboard.

The full size touchpad gives you the familiar scroll and navigation gestures. With the left- and right-click buttons below the touchpad and the volume control buttons above, control is at your fingertips.

For two-hand control, typically used by those who like to use their thumbs to navigate, a left mouse-click button is located on the upper left side of the keyboard—navigate with your right hand, select with your left.

Left mouse-click button
Shortcut and function keys
Volume control
Left and right mouse-click buttons


Step 1: Insert the Unifying receiver into a USB port on your computer.

Step 2: Pull to remove the yellow battery tab.

Note: Make sure that your keyboard switch is in the ON position. The ON/OFF switch is located at the top of the keyboard.
Your keyboard is ready to use.

Shortcut Keys

Shortcut and function keys streamline navigation, media control and keyboard functions.
Key Shortcut/Function
F1 Key Back
F2 key Home
F3 key Switch application
F4 key Menu
F5 key Search
F6 key Show/hide desktop
F7 key Maximise window
F7 key Switch screen
F7 key Media
F7 key Previous track
F7 key Play/Pause
F7 key Next track
F7 key Mute
F7 key Volume down
F7 key Volume up
Fn+ ins key Fn + ins: PC sleep
Fn+backspace key Fn + backspace: Print screen
Fn+Cap lock key Fn + caps lock: Scroll lock
Fn+Home key Fn + left arrow:Home
Fn+End key Fn + right arrow:End
Fn+Page up key Fn + up arrow:Page up
Fn+Page Down key Fn + down arrow:Page down
F1-F12 keys: To activate F1, simply press on Fn+ back

K400 Plus Extras

Touch tap
Touch tap

Press the Fn key and the left mouse button to toggle between touch tap disable and enabled.

You can also press the left mouse click button at the top-left of the keyboard to perform a click or comfortable two-handed navigation.

You can also tap the touchpad surface to perform a click.


Scroll with two fingers, up or down.

You can also press the Fn key and slide one finger anywhere on the touchpad simultaneously to scroll for comfortable two-handed navigation.

Receiver storage
When you are not using K400 Plus, store the Receiver in the battery compartment so that you never lose it.

Logitech Options

K400 Plus is a plug and play keyboard loaded with features right out of the box. If you like customization and loads of feature, then Logitech Options software was designed for you.

Download and install Options software to do the following:

  • Modify the speed of the cursor and adjust scrolling
  • Review tutorial videos on gestures
  • Create custom shortcut keys
  • Disable and enable keys—Caps Lock, Insert, Windows Start, and more.
  • Show Caps Lock notice and low-battery warning

Many other features are available.

Download Logitech Options


Compatible Computers

K400 Plus keyboard works with both desktop and laptop computers and is compatible with the following operating systems.

  • Windows® 7 and later
  • Chrome OS™
  • Android™ 5.0.2 and later

Keyboard functionality, such as Hot Keys and Touchpad Gestures, may differ depending on the operating system.

A quick check of your system settings will tell you if your device is compatible with K400 Plus.

Logitech Unifying wireless technology

Unifying wireless lets you add up to six Unifying ready devices to one tiny receiver.

Learn more about Unifying

Replace batteries
Replace batteries

K400 Plus is a plug and play keyboard designed for easy use and long life. However, if you encounter any issues or have questions about your product, Logitech is here to help. Start with a visit to our Customer Support page for full support.

Customer Support