Introduction
Thank you for choosing the Logitech K251 Bluetooth Wireless Keyboard. This manual provides detailed instructions for setting up, operating, maintaining, and troubleshooting your new keyboard. Designed for versatility and comfort, the K251 offers seamless connectivity across various devices, including laptops, Macs, mobile devices, and iPads.
For additional information and support, please refer to the official Logitech support website or the comprehensive user manual (PDF) available at Logitech K251 User Manual (PDF).

Setup Guide
1. Battery Installation
The Logitech K251 keyboard requires 2 AAA alkaline batteries (included). To install:
- Locate the battery compartment on the underside of the keyboard.
- Open the battery compartment cover.
- Insert the 2 AAA batteries, ensuring correct polarity (+/-).
- Close the battery compartment cover securely.
2. Bluetooth Pairing
The K251 keyboard uses Bluetooth wireless technology for seamless connectivity. No USB receiver is required, freeing up your device's USB ports.
- Ensure the keyboard batteries are installed and the keyboard is powered on.
- Long press the power switch button on the keyboard to initiate pairing mode. The connection LED should start blinking.
- On your device (laptop, Mac, mobile, iPad), go to Bluetooth settings.
- Search for available Bluetooth devices and select "Logitech K251" from the list.
- Follow any on-screen prompts to complete the pairing process.
- Once paired, the connection LED on the keyboard will stop blinking and remain solid for a few seconds, indicating a successful connection.


Operation
General Use
The Logitech K251 is a full-size keyboard with a compact design, including a numeric keypad and all essential keys. Its deep-profile keys offer quick response and a stable tactile feel for precise keystrokes, enhancing focus and comfort during use.



Compatibility
The K251 keyboard is designed for broad compatibility across multiple operating systems. It supports Bluetooth Low Energy technology and is compatible with:
- Windows 10, 11 or later
- macOS 12 or later
- ChromeOS
- Linux
- iPadOS 15 or later
- iOS 15 or later
- Android 12.0 or later
The keyboard features a multi-OS layout printing, adapting to different operating system key functions.

Maintenance
To ensure the longevity and optimal performance of your Logitech K251 keyboard, follow these daily maintenance tips:
- Tap Lightly: Develop the habit of typing lightly and avoid pressing keys forcefully.
- Maintain Cleanliness: Regularly wipe the surface of the product with a clean, soft cloth. Avoid scratching the bottom photoelectric cell or camera lens of the mouse (if applicable); gently clean it with a soft cloth.
- Cable Protection: Do not keep connecting wires in a tangled or bent state for extended periods, and avoid pulling the cable forcefully.
- Usage Environment: Avoid using the product in environments with high temperatures, high humidity, or excessive dust.
- Splash Resistance: The K251 is designed to be splash-resistant (1), offering protection against minor spills. However, it is not waterproof, so avoid submerging it in liquids.

Troubleshooting
If you encounter any issues with your Logitech K251 keyboard, consider the following steps:
- Connectivity Issues:
- Ensure the keyboard has fresh batteries and is powered on.
- Verify Bluetooth is enabled on your device.
- Try re-pairing the keyboard with your device.
- Ensure the keyboard is within the wireless range (about 10 meters).
- Unresponsive Keys:
- Check for any debris under the keys and clean the keyboard surface.
- Ensure the keyboard is properly connected via Bluetooth.
- Software-Related Problems:
- Visit www.logitech.com/support to download the latest software (e.g., Logi Options+) suitable for your product.
- Check for available firmware updates for your specific product model on the support website.
If the problem persists, you may need to contact customer support or refer to the official Logitech Support Community for further assistance.
Specifications
| Feature | Detail |
|---|---|
| Brand | Logitech |
| Model | K251 |
| Connectivity Type | Bluetooth Wireless (Bluetooth Low Energy Technology) |
| Wireless Range | About 10 meters |
| Keyboard Standard | 98 Keys (Full Size with Numeric Keypad) |
| Operation Style | Membrane |
| Backlight Type | No backlight |
| Keycup Material | ABS Plastic |
| Keycup Printing | Multi OS Layout |
| Switches Hot Swap | No |
| Wrist Support | No |
| Battery Type | 2 x AAA Alkaline Batteries (included) |
| Battery Life | Up to approximately 12 months |
| Dimensions (Length x Width x Height) | 369.9mm (14.56 inches) x 136.9mm (5.39 inches) x 22.8mm (0.90 inches) |
| Weight (with battery) | Approximately 380 grams (13.4 ounces) |
| Application | Desktop, Laptop, Tablet |
| Special Features | Splash-resistant, Tilt feet (approx. 7-degree typing angle) |

Warranty and Support
Warranty Information
All Logitech K251 keyboards purchased from our store are 100% original and authentic. They come with a one-year limited hardware warranty, ensuring a worry-free experience.
Customer Support
For any questions or issues regarding your product, you can:
- Contact the Seller: For direct assistance, you can contact the seller. Due to time differences, responses may take up to 24 hours.
- Visit Logitech Support Website: For comprehensive support, including FAQs, troubleshooting tips, diagnostic tools, and software updates, visit the official Logitech support website: www.logitech.com/support. Remember to replace "Product Model" with "K251" for specific product information.
- Firmware Upgrades: Check the support website for available firmware updates to fix known issues and improve performance.
- Support Community: Engage with other users and find solutions by visiting the Logitech Support Community.
Software and Feature Enhancement
To unlock the full potential of your Logitech K251, consider installing the official Logitech software:
- Logi Options+: Suitable for office series keyboards, offering customizable key functions, control flow operations, and cross-device transmission.
Download the appropriate software from www.logitech.com/support.
User Tips
- Multi-Device Connectivity: Take advantage of the K251's Bluetooth connectivity to easily switch between different devices like your laptop, tablet, and smartphone without needing to re-pair each time.
- Optimize for Comfort: Use the keyboard's tilt feet to adjust the typing angle (approximately 7 degrees) for a more ergonomic and comfortable typing experience.
- Software Customization: For advanced users, consider installing Logi Options+ software from the Logitech support website to customize key functions and enhance your workflow.
Compliance and Environmental Information
Hazardous Substances
The Logitech K251 complies with Chinese regulations, specifically the "Requirements for Identification of Hazardous Substances in Electronic and Electrical Products" (SJ/T 11364). A detailed table of harmful substance content (e.g., lead (Pb), mercury (Hg)) can be found in the product's accompanying documentation or on the official website.
Environmental Protection and Recycling
The environmental protection usage period of the product is dependent on normal working conditions, including temperature and humidity. Electronic products should not be disposed of as unclassified urban waste. Please follow local laws and regulations for proper disposal and send the product to an authorized electronic device recycling center.
The Logitech K251 is designed with sustainability in mind; its plastic parts are made of at least 64% environmentally-friendly recycled plastic, reflecting Logitech's commitment to sustainable design and durability.

