The Logitech K400 Plus is a wireless keyboard with a built-in touchpad, designed to control a TV-connected PC from the couch across a room-size distance. A 2.4GHz Logitech Unifying receiver plugs into a USB-A port on the PC and pairs with the keyboard for a wireless range of up to 33 feet. Battery life on two AA cells reaches 18 months of average use before a swap. Media hotkeys, an on/off switch, and spill resistance round out the design.
The perfect keyboard for use with your TV and beyond
The category the K400 Plus fits into is the HTPC keyboard, meaning a keyboard designed for a home theater PC rather than a desk PC. A Mac Mini, an Intel NUC, or an old laptop plugged into a TV as a media server benefits from a keyboard-touchpad combo that works from the couch without a mouse pad on the coffee table.
The layout on the keyboard follows a compact laptop-style design with a full QWERTY keyboard, arrow keys, and media hotkeys for volume, mute, and playback control. A 3.5-inch touchpad is positioned above the right side of the keyboard, with a second dedicated left-click button on the top-left corner for two-handed navigation while typing. Quiet-touch keys keep typing volume below 55 dBA, which is important on a couch setup where anyone else in the room can hear every keystroke.
The two AA batteries in the compartment power the keyboard for up to 18 months of average use, based on Logitech’s testing at two hours of typing per day. An on/off switch on the top edge also cuts the power completely when the keyboard is not in use, extending battery life further. Range on the 2.4GHz connection through the Unifying receiver reaches 33 feet, enough for most living rooms.
The plug-and-play setup means that the receiver connects directly to a USB-A port, and the keyboard is ready to use right away. There is no need to install drivers for this to work. Windows 7, Windows 8, Windows 10, Windows 11, Android 7 or greater, and Chrome OS all have native support for the K400 Plus, so you can start using it right out of the box. If you want additional features, you can download the free Logitech Options software to remap function keys or adjust touchpad sensitivity. Spill-resistant construction also protects against typical living room accidents such as a knocked-over drink, up to 60ml of liquid based on Logitech’s testing.
HTPC setups have gotten less common as streaming boxes such as Fire TV and Roku have taken over, but a PC hooked to a TV still has its use for anyone who uses specific apps such as Plex, Kodi, or Steam on the big screen. The K400 Plus is the go-to keyboard for that setup, with quiet keys, a big touchpad, and 18-month battery life. At $28, down from $35, the current sale takes 20% off retail.