1. Introduction
The Logitech MK550 Wireless Wave Keyboard and Mouse Combo is designed to provide a comfortable and efficient computing experience. Featuring an ergonomic wave-shaped keyboard and a precision laser mouse, this combo aims to enhance productivity and reduce strain during extended use. This manual will guide you through the setup, operation, maintenance, and troubleshooting of your new device.
2. What's in the Box
- Wireless Wave Combo MK550 (Keyboard and Mouse)
- Logitech Unifying receiver
- 4 AA alkaline batteries (pre-installed)
- User documentation
3. System Requirements
- Windows XP, Windows Vista, Windows 7, Windows 8, Windows 10
- USB port
- Internet connection (for software download)
4. Setup
4.1. Connecting the Logitech Unifying Receiver
- Locate the Logitech Unifying receiver. It is typically stored inside the mouse's battery compartment or included separately in the packaging.
- Plug the Unifying receiver into an available USB port on your computer.
- Your computer should automatically detect the receiver and install the necessary drivers.
4.2. Installing Batteries
The keyboard and mouse come with pre-installed batteries. To activate them, you may need to remove a pull-tab from the battery compartments.
- Keyboard: Open the battery compartment on the underside of the keyboard. Remove the protective pull-tab if present. Close the compartment.
- Mouse: Open the battery compartment on the underside of the mouse. Remove the protective pull-tab if present. Close the compartment.
Ensure the power switches on both the keyboard and mouse are in the 'ON' position. The devices should now be connected to your computer via the Unifying receiver.

Figure 1: An overhead view of the Logitech MK550 Wireless Wave Keyboard and Mouse Combo, showcasing the ergonomic wave design of the keyboard and the compact wireless mouse.
5. Operating the Keyboard
5.1. Ergonomic Design
The keyboard features a 'Constant Curve' layout and an integrated palm rest designed for a more natural and comfortable typing experience. This ergonomic design helps reduce wrist fatigue during prolonged use.

Figure 2: A top-down view of hands positioned comfortably on the ergonomic wave-shaped keyboard, demonstrating the natural typing posture.

Figure 3: A side profile of hands resting on the integrated palm rest of the keyboard, highlighting the comfortable angle for wrist support.
5.2. Programmable Keys
The keyboard includes 18 programmable keys, allowing for rapid navigation to frequently used applications or functions. To customize these keys, download the Logitech Options software from the official Logitech website.
5.3. Media Controls
Dedicated media control buttons are located at the top of the keyboard for easy access to playback, volume, and mute functions.
6. Operating the Mouse
6.1. Precision Laser Tracking
The included precision laser mouse offers smooth and accurate tracking for detailed work and faster navigation.

Figure 4: A close-up of a hand comfortably gripping the contoured design of the Logitech wireless mouse.
6.2. Battery Life
The keyboard boasts a battery life of up to 3 years, while the mouse offers up to 2 years of battery life, depending on usage.
7. Maintenance
7.1. Cleaning
To clean your keyboard and mouse, use a soft, lint-free cloth. For stubborn dirt, slightly dampen the cloth with water or a mild cleaning solution. Avoid harsh chemicals or abrasive materials.
7.2. Battery Replacement
When the battery indicator light on your keyboard or mouse signals low power, replace the batteries with new AA alkaline batteries. Ensure correct polarity when inserting new batteries.
8. Troubleshooting
8.1. Connection Issues
- No connection: Ensure the Unifying receiver is securely plugged into a USB port and the keyboard/mouse power switches are ON.
- Interference: Move the keyboard/mouse closer to the receiver. Avoid placing the receiver near other electrical devices that might cause interference.
- Re-pairing: If connection is lost, use the Logitech Unifying Software (downloadable from Logitech's website) to re-pair your devices with the receiver.
8.2. Key/Mouse Responsiveness
- Lag or unresponsiveness: Check battery levels and replace if necessary. Ensure no physical obstructions are blocking the mouse's laser sensor.
- Sticky keys: Clean the keyboard thoroughly as described in the Maintenance section.
9. Specifications
| Feature | Detail |
|---|---|
| Product Dimensions | 10.44 x 3.09 x 19.69 inches |
| Item Weight | 2.2 pounds |
| Item Model Number | 920-002555 |
| Batteries | 1 Lithium Polymer batteries required (included) - Note: Product description states 4 AA alkaline batteries. Please verify actual battery type. |
| Connectivity Technology | Wireless (2.4GHz with Unifying receiver) |
| Special Feature | Ergonomic, Wrist Rest |
| Compatible Devices | Personal Computer |
| Color | Black |
10. Warranty and Support
10.1. Warranty Information
Logitech products are manufactured to the highest quality standards. For detailed warranty information, please refer to the warranty card included with your product or visit the official Logitech website.
10.2. Customer Support
For technical assistance, product inquiries, or to download the latest software and drivers, please visit the Logitech support website or contact their customer service directly. Contact information can be found in your product documentation or on the Logitech website.





