1. Product Overview
The SEENDA KOS300 is a full-size 2.4GHz wireless keyboard designed for comfortable and quiet typing. It features a Japanese key layout, convenient shortcut keys, and an adjustable stand for ergonomic use. This keyboard is compatible with Windows and Chrome OS devices.

Image: SEENDA KOS300 Wireless Silent Keyboard, showcasing its full layout and sleek design.
2. Setup Instructions
2.1 Package Contents
- SEENDA KOS300 Wireless Silent Keyboard
- USB Receiver
- User Manual (this document)
2.2 Battery Installation
The keyboard requires AAA batteries (not included). Locate the battery compartment on the underside of the keyboard, open it, and insert the batteries according to the polarity indicators. Close the compartment securely.
2.3 Connecting the Keyboard
- Remove the USB receiver from its storage slot on the keyboard.
- Plug the USB receiver into an available USB port on your computer.
- Turn on the keyboard using the ON/OFF switch, usually located on the top right side of the keyboard. The keyboard should automatically connect to your computer.

Image: Simple connection by plugging the USB receiver into a computer's USB port.
Note: For initial pairing or if connection issues occur, press the 'Esc' key and the '~' key simultaneously. While the red indicator light is on (within 10 seconds), insert the USB receiver into your computer's USB port. This helps ensure proper recognition.
3. Operating Instructions
3.1 Silent Typing Experience
The KOS300 keyboard features a membrane-type silent design, reducing typing noise by over 90% compared to conventional membrane keyboards. This allows for focused work in quiet environments such as meeting rooms, libraries, or cafes.

Image: Illustration of the silent typing feature, showing reduced noise levels.
3.2 Comfortable Typing
Each key surface is designed with a spherical indentation to fit your fingertips, enabling smooth and precise typing. With a shallow key stroke of approximately 2.0mm, it provides a quiet keystroke. The 19mm key pitch and large Enter key further reduce input errors, ensuring a comfortable typing experience.

Image: Close-up of the spherical keycap design for comfortable typing.
3.3 Function and Shortcut Keys
The keyboard is equipped with 12 function keys and 14 shortcut keys for efficient input and easy navigation. These keys provide instant access to media controls (music, play/pause, volume adjustment), application switching, screenshots, emoji input, and home page access, significantly improving productivity.

Image: Detailed layout of the shortcut keys for various functions.
Note: Some F-keys and multimedia key functions may not be available on Mac OS.
4. Features
4.1 Adjustable Stand
The keyboard includes a foldable stand that allows for two-stage angle adjustment. This reduces the burden on your wrists and hands, making it less tiring for long PC work sessions.

Image: The keyboard's adjustable stand, showing two possible tilt angles for ergonomic comfort.
4.2 Durability and Power Saving
The KOS300 keyboard features durable keys capable of withstanding up to 10 million keystrokes, ensuring long-term use. It also incorporates a power-saving mode: if unused for 3 minutes, it automatically enters a deep sleep mode. Pressing any key will wake it up. A battery level indicator lamp is included to notify you when the batteries need replacement, preventing sudden power loss.

Image: Close-up of the keyboard's battery indicator lamp.
4.3 Wide Compatibility
This wireless keyboard is compatible with devices running Windows and Chrome OS.

Image: Windows logo indicating compatibility with Windows operating systems.
5. Specifications
| Brand | seenda |
| Model Name | KOS300 |
| Product Dimensions | 44.5 x 15 x 2 cm |
| Item Weight | 750 g |
| Color | Black |
| Connectivity Technology | 2.4GHz Wireless (USB Receiver) |
| Keyboard Description | Membrane |
| Operating System | Chrome OS, Windows |
| Power Source | Battery Powered (AAA batteries, not included) |
| Special Features | Integrated stand, Hotkeys and Media keys, Foldable |
6. Troubleshooting
6.1 Keyboard Not Responding
- Ensure the keyboard is turned ON.
- Check if the USB receiver is securely plugged into a working USB port on your computer.
- Replace the batteries if the battery indicator light is off or blinking.
- For initial pairing or reconnection, press the 'Esc' key and the '~' key simultaneously. While the red indicator light is on (within 10 seconds), insert the USB receiver into your computer's USB port.
6.2 Unexpected Browser Launch
- If pressing the key above 'Backspace' (often marked with a 'Home' icon) unexpectedly launches a browser, this is a specific shortcut key function. If this behavior is undesirable, you may need to remap or disable this key using your operating system's keyboard settings or third-party software.
7. Warranty and Support
SEENDA provides a 1-year product warranty service from the date of purchase. In the unlikely event of an initial defect, please contact our customer support for assistance.
For further inquiries or support, please visit the official SEENDA website or contact our customer service team.
8. Product Video
Video: A product demonstration video showcasing the features and usage of the SEENDA KOS300 keyboard.





