1. Product Overview
The Logitech Wireless K400R is a slim, compact keyboard designed for comfortable and quiet typing, featuring an integrated 3.5-inch multi-touch touchpad. It offers a reliable wireless connection via the Logitech Unifying Receiver, making it ideal for controlling your laptop, desktop PC, or even a connected TV from a distance.
Figure 1: Logitech K400R Wireless Keyboard, showcasing its compact design and integrated touchpad.
Key features include a 10-meter wireless range, plug-and-play simplicity, and a long 12-month battery life. The multi-touch touchpad supports gestures such as pinch-to-zoom, pan, scroll, and image rotation, enhancing navigation and control.
2. Setup Guide
2.1. Package Contents
Before you begin, ensure your package contains the following items:
- Logitech Wireless K400R Keyboard
- Logitech Unifying Receiver
- 2 AA Batteries (pre-installed or included)
2.2. Battery Installation
The Logitech K400R keyboard is powered by two AA batteries. These are typically pre-installed or included in the packaging.
- Locate the battery compartment cover on the underside of the keyboard.
- Slide the cover open.
- Insert the two AA batteries, ensuring correct polarity (+ and -).
- Close the battery compartment cover securely.
2.3. Connecting the Unifying Receiver
The Logitech K400R uses a Logitech Unifying Receiver for wireless connectivity. This receiver allows you to connect multiple compatible Logitech devices to a single USB port.
- Locate the Logitech Unifying Receiver. It is a small USB dongle.
- Plug the Unifying Receiver into an available USB port on your computer or TV.
- The operating system should automatically detect and install the necessary drivers. This is a plug-and-play process.
- Turn on the keyboard using the power switch, usually located on the top right edge of the keyboard.
- The keyboard should now be connected and ready for use.
3. Operating the Keyboard
The Logitech K400R provides a full keyboard layout along with an integrated multi-touch touchpad for seamless navigation.
3.1. Basic Keyboard Functions
The keyboard features 79 keys, including standard alphanumeric keys, function keys (F1-F12), and media control keys. Use the keys as you would with any standard keyboard for typing and command input.
3.2. Touchpad Operation
The large 3.5-inch multi-touch touchpad allows for intuitive cursor control and gesture-based navigation.
- Single Finger Tap: Functions as a left-click.
- Two Finger Tap: Functions as a right-click.
- Scrolling: Drag two fingers up or down on the touchpad to scroll vertically.
- Pinch-to-Zoom: Place two fingers on the touchpad and pinch them together to zoom out, or spread them apart to zoom in.
- Pan: Drag two fingers across the touchpad to pan horizontally or vertically within a document or image.
- Rotate: Rotate two fingers on the touchpad to rotate images or objects (application dependent).
Figure 2: The Logitech K400R keyboard in use, demonstrating its suitability for controlling media from a comfortable distance.
3.3. Wireless Range and Connectivity
The keyboard offers an ample wireless range of up to 10 meters (approximately 33 feet), providing flexibility to control your device from across the room. The Logitech Unifying Receiver ensures a stable and reliable connection.
The K400R is compatible with various devices, including laptops, desktop PCs, and smart TVs that support USB keyboards and mice. Its plug-and-play design allows for quick switching between compatible devices.
4. Maintenance
4.1. Cleaning the Keyboard
To maintain the performance and appearance of your keyboard, regular cleaning is recommended:
- Turn off the keyboard before cleaning.
- Use a soft, lint-free cloth slightly dampened with water or a mild cleaning solution.
- Avoid using abrasive cleaners, solvents, or aerosol sprays directly on the keyboard.
- For dust and debris between keys, use compressed air.
- Gently wipe the touchpad surface to ensure smooth operation.
4.2. Battery Replacement
The keyboard boasts a battery life of up to 12 months under typical usage. When the battery indicator light (if present) signals low power, or if the keyboard becomes unresponsive, it's time to replace the batteries.
- Turn off the keyboard.
- Open the battery compartment on the underside.
- Remove the old AA batteries.
- Insert two new AA batteries, observing the correct polarity.
- Close the battery compartment.
- Turn the keyboard back on.
5. Troubleshooting
If you encounter issues with your Logitech K400R keyboard, try the following troubleshooting steps:
- No Response from Keyboard:
- Ensure the keyboard is turned on.
- Check battery levels and replace if necessary.
- Ensure the Unifying Receiver is securely plugged into a working USB port. Try a different USB port.
- Move the keyboard closer to the Unifying Receiver to rule out range issues.
- If you have other Logitech Unifying devices, ensure the keyboard is paired correctly using the Logitech Unifying Software (available for download from Logitech's official website).
- Touchpad Not Responding or Erratic:
- Ensure the touchpad surface is clean and free of debris.
- Restart your computer or TV.
- Check for any software conflicts or driver issues on your operating system.
- Interference Issues:
- Other wireless devices (e.g., Wi-Fi routers, cordless phones) can cause interference. Try to minimize their proximity to the keyboard and receiver.
For further assistance, refer to the Logitech support website or contact their customer service.
6. Specifications
| Feature | Detail |
|---|---|
| Brand | Logitech |
| Model Number | FBA_920-003109 (K400R) |
| Connectivity Technology | Wireless (Logitech Unifying Receiver) |
| Wireless Range | 10 meters (33 feet) |
| Keyboard Description | Wireless, Slim |
| Number of Keys | 79 |
| Touchpad Size | 3.5 inches (integrated multi-touch) |
| Power Source | 2 x AA Batteries |
| Estimated Battery Life | 12 months |
| Compatible Devices | Laptop, Desktop PC, Smart TV |
| Color | Black |
| Product Dimensions (LxWxH) | 8.27 x 2.24 x 7.09 inches |
| Item Weight | 1 pound |
| Manufacturer | Logitech |
| Date First Available | December 8, 2012 |
7. Warranty and Support
Logitech products are manufactured to high quality standards and are backed by a limited hardware warranty. For specific warranty terms and conditions applicable to your Logitech K400R keyboard, please refer to the warranty information provided with your purchase or visit the official Logitech support website.
For technical support, driver downloads, FAQs, and additional resources, please visit the official Logitech support website:
When contacting support, please have your product model number (K400R or FBA_920-003109) and purchase information ready.
