Introduction
This manual provides detailed instructions for setting up, operating, and maintaining your LeadsaiL FA98 Wireless Keyboard and Mouse Combo. This combo features a 2.4GHz stable wireless connection, low-profile red mechanical switches for a superior typing experience, and multi-platform compatibility. Please read this manual thoroughly before use to ensure optimal performance and longevity of your product.
Package Contents
- LeadsaiL FA98 Wireless Mechanical Keyboard
- LeadsaiL Wireless Mouse
- 1 Nano USB Receiver (stored in the mouse battery compartment)
- User Manual
Note: 2 AAA batteries are required for the keyboard and 1 AA battery is required for the mouse. Batteries are not included.
Setup Instructions
- Insert Batteries:
- For the keyboard: Open the battery compartment on the underside of the keyboard and insert 2 AAA batteries, ensuring correct polarity.
- For the mouse: Open the battery compartment on the underside of the mouse and insert 1 AA battery, ensuring correct polarity.

Image: Underside of the keyboard and mouse, illustrating battery insertion and USB receiver location.
- Locate and Connect USB Receiver: The Nano USB receiver is stored inside the mouse's battery compartment. Carefully remove it. Plug the USB receiver into an available USB port on your computer (desktop, laptop, or PC).
- Power On: Turn on the keyboard and mouse using their respective power switches. The power switch for the keyboard is located on the top right edge, and for the mouse, it's on the underside.
- Automatic Connection: The keyboard and mouse should automatically connect to your computer. No additional drivers are required.
Video: Official product video demonstrating the setup and features of the LeadsaiL FA98 Wireless Mechanical Keyboard and Mouse Combo.
Operating Instructions
Keyboard Usage
- Typing Experience: The keyboard features low-profile red mechanical switches designed for smooth, semi-quiet typing with tactile feedback. Keys rebound quickly to reduce finger fatigue.
- Ergonomic Design: The keyboard includes a foldable stand that allows for a 9° typing angle, enhancing comfort during extended use.

Image: Keyboard with its foldable stand extended, providing an ergonomic 9° typing angle.
- Multi-Platform Compatibility: The keyboard is compatible with Windows, MacOS, and Linux. Use the following key combinations to switch modes:
- Press Fn + O for MacOS.
- Press Fn + P for Windows.

Image: Keyboard showing key combinations for switching between MacOS and Windows modes.
- FN+ Shortcuts & Hot Keys: The keyboard includes 12 FN+ shortcuts and 5 hot keys for enhanced productivity. Refer to the keycap legends for specific functions (e.g., media control, volume adjustment).
- Indicator Lights: The keyboard features indicator lights for Number Lock, Caps Lock, and Low Battery status.
Mouse Usage
- Silent Clicks: The mouse is designed for silent operation, minimizing click noise.
- DPI Adjustment: Adjust the mouse sensitivity (DPI) to your preference. The mouse typically offers multiple DPI levels (e.g., 800, 1200, 1600 DPI) which can be cycled through using a dedicated button, usually located near the scroll wheel.

Image: Wireless mouse illustrating DPI adjustment options.
- Ergonomic Design: The mouse features an ergonomic design for a comfortable grip and smooth operation.
Smart Energy Saving
Both the keyboard and mouse are equipped with smart energy-saving features. They will enter auto-standby mode after a period of inactivity (keyboard after 5 seconds, mouse after 3 seconds). Click any key or button to wake them up.
Key Features
- 2.4GHz Stable Wireless Connection: Provides a reliable connection up to 33 feet (10 meters) away. The single Nano USB receiver connects both the keyboard and mouse.

Image: Wireless keyboard and mouse in use, demonstrating 2.4GHz stable wireless connection.
- Superior Typing Experience: Equipped with low-profile red mechanical switches for optimal feedback, comfort, and semi-quiet operation.

Image: Detailed view of low-profile mechanical switches, highlighting their design.
- Compact and Sleek Design: The FA98 combo features a compact design, saving desktop space and offering portability. Its slim profile and sturdy construction ensure durability.
- Double-shot Injection Keycaps: Keycaps are made with dual-color injection molding technology, ensuring clear, vivid, and fade-resistant letters and symbols. They provide a comfortable and ergonomic typing experience.
Maintenance
- Cleaning: Use a soft, dry cloth to clean the surfaces of the keyboard and mouse. For stubborn dirt, a slightly damp cloth can be used, but ensure no moisture enters the devices.
- Battery Replacement: Replace batteries when the low battery indicator light appears or when performance degrades. Always use new batteries of the specified type (AAA for keyboard, AA for mouse).
- Storage: When not in use for extended periods, turn off the devices to conserve battery life. Store them in a cool, dry place.
Troubleshooting
- Keyboard/Mouse not responding:
- Ensure the USB receiver is securely plugged into a working USB port on your computer.
- Check if the keyboard and mouse are powered on.
- Replace the batteries in both devices with fresh ones.
- Try plugging the USB receiver into a different USB port.
- Restart your computer.
- Intermittent connection or lag:
- Ensure the devices are within the 33-foot (10-meter) operating range of the USB receiver.
- Move the computer closer to the keyboard and mouse, or move any objects that might be causing interference (e.g., large metal objects, other wireless devices).
- Avoid using the devices on metal surfaces, which can interfere with the wireless signal.
- Keys are not typing correctly or are sticky:
- Clean the keycaps and the area around the switches to remove any debris.
- Ensure the keyboard is not in a different operating system mode (e.g., MacOS mode when using Windows).
Specifications
| Brand | LeadsaiL |
| Model Number | FA98 |
| Connectivity Technology | 2.4GHz Wireless (USB Receiver) |
| Keyboard Dimensions | 14.84 x 5.39 x 1.06 inches (37.7 x 13.7 x 2.7 cm) |
| Item Weight | 1.94 pounds (0.88 kg) |
| Keyboard Battery | 2 AAA batteries (not included) |
| Mouse Battery | 1 AA battery (not included) |
| Special Features | Double Shot Injection Keycaps, Ergonomic, Low-Profile Mechanical Red Switches, Portable, Smart Energy Saving |
| Compatible Devices | Laptop, Personal Computer (Windows, MacOS, Linux) |
Warranty and Support
For warranty information and technical support, please refer to the documentation included with your product or visit the official LeadsaiL website. Keep your purchase receipt for warranty claims.


