Logitech K400 Plus Wireless Touch Keyboard: Built-In Touchpad and 10m Range

The Logitech K400 Plus is built for a very specific desk-or-couch problem: you need a keyboard and pointer for a PC connected to a TV, but you do not want a separate mouse sliding around on the sofa. The model here is the black K400 Plus Wireless Touch Keyboard, Logitech part number 920-007119.

The built-in touchpad changes where you can use it: the keyboard does not need a separate surface for a mouse. Media keys keep common controls close to the typing area, while the small USB Unifying receiver connects it to a compatible device. That is a practical combination for occasional searches, playback control and short messages from the couch. Check for a spare USB port first; this version uses the receiver rather than Bluetooth.

The built-in touchpad is the reason to buy it

The K400 Plus combines typing and pointer control in one compact board. Logitech lists the touchpad at 76 by 47 mm, large enough for basic cursor movement, clicking and media navigation without reaching for a separate mouse. That makes the product especially useful for a living-room PC, mini PC, media center or other setup where a normal mouse surface is inconvenient.

This is not a productivity keyboard designed to replace a full desktop keyboard and mouse for all-day office work. There is no separate number pad, and the layout is intentionally compact. The value comes from reducing two input devices to one when browsing, searching, launching videos or controlling a PC from several feet away.

USB receiver wireless is simple, but it is not Bluetooth

Logitech uses its 2.4 GHz Unifying wireless protocol, and the included receiver plugs into a USB port. The company rates wireless range at more than 10 meters, although actual range depends on the room and nearby interference.

That connection choice makes setup straightforward on a compatible PC: plug in the receiver and start using the keyboard. It also creates a clear buying boundary. If your device has no available USB port, or if you specifically want direct Bluetooth pairing to tablets and phones without a receiver, the K400 Plus is not the right keyboard.

Logitech currently lists compatibility with Windows 10 and Windows 11 or later, Android 7 or later and ChromeOS, with an available USB port required. The receiver is part of the package, so buyers do not need to source it separately.

Battery life and spill resistance suit occasional living-room use

The K400 Plus runs on two AA batteries, included in the box. Logitech rates battery life at up to 18 months, with actual life depending on usage and computing conditions. A physical on/off switch and power-saving behavior help reduce unnecessary battery drain.

The keyboard is also spill-resistant under limited conditions. Logitech specifies testing for up to 60 ml of liquid and explicitly warns not to immerse the keyboard. That is useful protection for a couch or coffee-table device, but it should not be interpreted as waterproofing.

Logitech lists the keyboard at roughly 354.3 mm wide, 139.9 mm deep and 23.5 mm thick, with a weight of about 390 g including batteries. It is compact enough to move between a shelf and the sofa without feeling like a full desktop board.

Who should buy the Logitech K400 Plus?

The K400 Plus makes the most sense for anyone controlling a PC-connected TV, home-theater PC, mini PC or shared media computer from a couch or across a room. Its strongest advantages are the built-in touchpad, dedicated media controls, long battery target and plug-and-play USB receiver.

Skip it if you need Bluetooth, backlit keys, a number pad, premium typing feel or a larger precision touchpad. It is also a weaker fit for people who work at a desk all day and already have space for a normal mouse.

For the use case Logitech designed around, though, the K400 Plus remains easy to understand: one compact wireless board replaces both keyboard and mouse for casual navigation, keeps the receiver-based setup simple, and avoids turning a living-room PC into a two-device balancing act.