Logitech K400 Wireless Touch Keyboard – Built-In Touchpad & Unifying Receiver
Control your computer or home entertainment PC comfortably from across the room with the Logitech K400 Wireless Touch Keyboard. Combining a compact keyboard and integrated touchpad into a single wireless controller, the K400 eliminates the need for a separate mouse and is particularly well suited for living-room PCs, media centers, HTPC systems, presentations, and other applications where conventional desktop controls aren't convenient.
The K400 uses Logitech's 2.4 GHz Unifying wireless technology and provides an operating range of up to 33 feet (10 meters), giving you convenient keyboard and pointer control from a couch, chair, or across the room.
Key Features
Keyboard & Touchpad in One – Integrated touchpad eliminates the need for a separate wireless mouse.
Up to 33-Foot Wireless Range – Logitech 2.4 GHz wireless technology provides control from up to approximately 10 meters away.
Logitech Unifying Receiver – Connects through the compact Logitech Unifying USB receiver.
Compact Design – Full keyboard functionality in a space-saving format designed for comfortable lap or living-room use.
Integrated Mouse Controls – Navigate menus, websites, media applications, and the Windows desktop directly from the keyboard.
Multi-Touch Gesture Support – Supports pointer movement, scrolling, right-click, drag-and-drop, and pinch-to-zoom functionality on supported Windows systems.
Dedicated Media Functions – Convenient keyboard shortcuts make the K400 particularly useful for entertainment and multimedia PCs.
Up to 12-Month Battery Life – Designed for extended operation from two replaceable AA batteries.
On/Off Switch – Conserves battery power when the keyboard isn't being used.
Plug-and-Play USB Connection – Connect the Unifying receiver to a compatible computer's USB port for straightforward wireless operation.
Lightweight & Portable – Easy to move between a desk, couch, conference room, or entertainment setup.
Logitech's specifications confirm the original K400 uses a 2.4 GHz Unifying connection with a maximum rated range of 33 feet/10 meters and operates from two replaceable AA alkaline TypeWireless Touch KeyboardKeyboard StyleCompactIntegrated TouchpadYesWireless TechnologyLogitech 2.4 GHzReceiverLogitech Unifying Nano ReceiverWireless RangeUp to 33 ft. / 10 mReceiver InterfaceUSB 2.0Power2 × AA BatteriesBattery TypeReplaceable AlkalineRated Battery LifeUp to 12 MonthsPower SwitchYesBacklit KeysNoKeyboard Width354 mm / 13.9 in.Keyboard Depth136 mm / 5.35 in.Keyboard Height24 mm / 0.94 in.Weight with Batteries360 g / 12.7 oz.Receiver SizeNanoBluetoothNo
The physical dimensions and 360-gram weight are Logitech's published specifications for the original K400.
Integrated Touchpad
The K400's defining feature is its built-in touchpad, allowing one device to handle both typing and pointer navigation.
On supported Windows systems, Logitech documents touchpad gestures including:
This makes the keyboard particularly convenient for browsing websites, selecting streaming content, navigating media-center software, and controlling a computer connected to a television.
Designed for Living-Room PC Control
The combination of wireless operation and integrated pointing controls makes the K400 an excellent solution for:
Instead of balancing a separate keyboard and mouse while sitting away from a desk, the K400 puts both controls into one compact device.
Logitech Unifying Wireless Technology
The original K400 communicates through a Logitech Unifying USB receiver rather than Bluetooth.
The compact nano receiver connects to a USB port and uses Logitech's 2.4 GHz wireless protocol. Logitech specifies a maximum operating distance of approximately 33 feet / 10 meters, although actual range can vary depending on the environment and wireless interference.
Important: Because the K400 is not a Bluetooth keyboard, a compatible Logitech Unifying receiver is required for normal wireless operation.
Battery Powered
The K400 operates from two replaceable AA alkaline batteries, with Logitech specifying battery life of up to approximately 12 months under typical usage conditions. An integrated power switch allows the keyboard to be turned off when not in use.
Original K400 vs. K400 Plus
This listing is for the original Logitech K400. It should not be confused with the later K400 Plus, which has a similar overall concept but different specifications and physical design.
For example, Logitech rates the original K400 for up to 12 months of battery life, while the later K400 Plus is rated for up to 18 months. The K400 Plus also uses a 3.5-inch multi-finger touchpad and has slightly different dimensions and weight.
Original Package Contents
Logitech's original K400 package included:
(1) Logitech K400 Wireless Touch Keyboard
(1) Logitech Unifying Nano Receiver
(2) AA Batteries
(1) USB Receiver Extension Cable
User Documentation
The Logitech Unifying receiver is an important component of the K400 because the keyboard does not connect through Bluetooth.
With its combination of an integrated touchpad, compact keyboard layout, 33-foot wireless range, Logitech Unifying connectivity, and long AA-battery operation, the K400 remains a practical all-in-one controller for computers, HTPCs, and entertainment systems where using a conventional keyboard and separate mouse would be inconvenient.
** Disclaimer **
The preceding item description was written by a large language model and may contain errors, discrepancies, false claims, could just be making it up. Please be advised that specifications should be verified using the manufacturer's documentation and for descriptions of condition or any other inquiry by directly messaging the seller.
Please review listing photos for the exact condition and contents included.
