1. Introduction
This user manual provides detailed instructions for the DeLUX KF19 Foldable Bluetooth Keyboard. Please read this manual carefully before using the product to ensure proper operation and to maximize its lifespan. This keyboard is designed for portability and multi-device compatibility, making it ideal for use with smartphones, tablets, PCs, and laptops across various operating systems including iOS, Android, Windows, and Mac OS.
2. Product Overview
2.1 Product Components
The DeLUX KF19 Foldable Bluetooth Keyboard package includes the following items:
- DeLUX KF19 Foldable Bluetooth Keyboard
- USB Cable
- Stand Holder
- User Manual (this document)
2.2 Key Features
The DeLUX KF19 keyboard offers several features designed for convenience and efficiency:
- Pocket and Mini Size: Lightweight and compact, making it easy to carry for travel and business trips.
- Stable Multi-Device Connection: Bluetooth connectivity with three channels, allowing connection to up to three devices and easy switching between them.
- Built-in Rechargeable Battery: Provides up to 60 hours of use after a 1.5-hour charge, suitable for extended travel.
- Scissor Switch Keys: Ensures silent, responsive typing and reduces fatigue during long work sessions.
- Wide Compatibility: Compatible with smartphones, tablets, PCs, laptops, desktops, and other Bluetooth-enabled devices, supporting Android, Windows, iOS, and Mac OS.
2.3 Product Visuals







3. Setup
3.1 Charging the Keyboard
Before first use, or when the battery is low, charge the keyboard using the provided USB cable. Connect the USB cable to the keyboard's charging port and the other end to a USB power source (e.g., computer USB port, wall adapter).
- A full charge takes approximately 1.5 hours.
- The keyboard can last up to 60 hours of continuous use or 60 days on standby after a full charge.

3.2 Bluetooth Pairing
The DeLUX KF19 keyboard supports connection to up to three Bluetooth devices simultaneously. Follow these steps to pair your keyboard:
- Power On: Unfold the keyboard to automatically power it on.
- Select Channel: Press the Fn key simultaneously with one of the Bluetooth channel keys (BT1, BT2, or BT3) to select a channel. The corresponding indicator light will blink.
- Enter Pairing Mode: Press Fn + C (or the dedicated pairing key if available, often labeled with a Bluetooth symbol) to enter pairing mode. The indicator light for the selected channel will blink rapidly.
- Enable Bluetooth on Device: On your device (smartphone, tablet, PC), go to Bluetooth settings and turn on Bluetooth.
- Select Keyboard: Look for "DeLUX KF19" or a similar name in the list of available devices and select it to connect.
- Confirm Connection: Once connected, the indicator light on the keyboard will stop blinking and remain solid for a few seconds before turning off.
Repeat these steps for up to three different devices using BT1, BT2, and BT3 channels.

4. Operating Instructions
4.1 Power On/Off
- Power On: Simply unfold the keyboard. It will automatically power on and attempt to connect to the last paired device.
- Power Off: Fold the keyboard to automatically power it off. The magnetic closure ensures it stays securely closed and prevents accidental power-on.

4.2 Switching Between Devices
To switch between your paired devices, simply press Fn and the corresponding channel key (BT1, BT2, or BT3). The keyboard will quickly connect to the selected device.
4.3 Operating System Switching
The keyboard is optimized for different operating systems. To switch the keyboard's layout and function keys for your specific OS, press Fn simultaneously with the relevant OS key:
- Fn + Q for iOS / Mac OS
- Fn + W for Android
- Fn + E for Windows
4.4 Multimedia Functions
The keyboard features dedicated multimedia function keys (F1-F12) that can be accessed by pressing the Fn key in combination with the desired function key. These shortcuts provide convenient access to media controls, volume adjustments, and other system functions.

5. Maintenance
Proper maintenance ensures the longevity and optimal performance of your DeLUX KF19 keyboard.
- Cleaning: Use a soft, dry, lint-free cloth to clean the keyboard surface. For stubborn dirt, slightly dampen the cloth with water or a mild, non-abrasive cleaner. Avoid excessive moisture. Do not spray cleaners directly onto the keyboard.
- Dust and Debris: Regularly use compressed air to clear dust and debris from between the keys. This is especially important for foldable keyboards that may be exposed to various environments during travel.
- Storage: When not in use, fold the keyboard to protect the keys. Store it in a cool, dry place away from direct sunlight, extreme temperatures, and humidity.
- Avoid Liquids: Do not expose the keyboard to liquids. In case of accidental spills, immediately power off the keyboard by folding it, disconnect it from any power source, and allow it to dry completely before attempting to use it again.
6. Troubleshooting
If you encounter issues with your DeLUX KF19 keyboard, please refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Keyboard does not power on. | Low battery; keyboard not unfolded correctly. | Charge the keyboard fully. Ensure the keyboard is fully unfolded to activate. |
| Cannot connect via Bluetooth. | Keyboard not in pairing mode; device Bluetooth off; interference; already connected to max devices. | Ensure keyboard is in pairing mode (Fn + C). Check if Bluetooth is enabled on your device. Move closer to the device. Disconnect from other devices if necessary. |
| Keys are unresponsive or typing errors occur. | Low battery; dust/debris under keys; incorrect OS mode. | Recharge the keyboard. Clean keys with compressed air. Ensure correct OS mode is selected (Fn + Q/W/E). |
| Keyboard disconnects frequently. | Low battery; too far from device; interference. | Charge the keyboard. Keep the keyboard within the effective Bluetooth range (approx. 10 meters). Avoid strong electromagnetic interference. |
| Keyboard feels unstable on lap. | Design for flat surface use. | For optimal stability, use the keyboard on a flat, stable surface such as a desk or table. |
7. Specifications
| Feature | Detail |
|---|---|
| Model Number | KF19 |
| Product Dimensions (Unfolded) | 11.43 x 3.97 x 0.34 inches (29.03 x 10.08 x 0.86 cm) |
| Item Weight | 6.6 ounces (187 grams) |
| Connectivity Technology | Bluetooth |
| Number of Keys | 65 |
| Fold Style | 2-fold |
| Battery Type | Lithium Ion (included) |
| Charging Time | Approx. 1.5 hours |
| Usage Time (Full Charge) | Up to 60 hours |
| Standby Time (Full Charge) | Up to 60 days |
| Compatible Devices | PC, Smartphone, Tablet |
| Compatible OS | Android, Windows, iOS, Mac OS |
| Color | Black |
8. Warranty and Support
DeLUX products are manufactured with high-quality standards. For warranty information, technical support, or any inquiries regarding your DeLUX KF19 Foldable Bluetooth Keyboard, please visit the official DeLUX website or contact their customer service directly. Keep your purchase receipt as proof of purchase for warranty claims.
You can find more information and contact details on the DeLUX Brand Store on Amazon.





