UBOTIE SK-621BT
UBOTIE Portable Bluetooth Keyboard User Manual
Model: SK-621BT
1. Introduction
Thank you for choosing the UBOTIE Portable Bluetooth Colorful Computer Keyboard. This wireless keyboard combines a unique retro typewriter design with modern functionality, offering a comfortable and efficient typing experience. Its vibrant multi-color keycaps are designed to resist fading, ensuring a lasting aesthetic appeal. This keyboard is ideal for various uses, including everyday tasks, personal projects, education, and business, and is compatible with a wide range of devices.
Key features include:
- Gorgeous Color Design: Each keyboard features a distinctive multi-color design with fade-resistant keycaps.
- Retro Round Keycaps: Inspired by classic typewriters, providing a unique tactile experience.
- Wide Compatibility: Seamlessly connects with Windows, Mac OS, iOS, and Android devices.
- Stable Bluetooth Connection: Offers a 10-meter connection range, quick re-connection, and auto-sleep function.
- Multi-Channel Connectivity: Supports BT1, BT2, and BT3 channels for simultaneous connection to multiple devices.
2. Setup
2.1. Battery Installation
The UBOTIE keyboard requires 2 AAA batteries for operation. These are typically included in the package.
- Locate the battery compartment on the underside of the keyboard.
- Slide open the battery compartment cover.
- Insert 2 AAA batteries, ensuring correct polarity (+/-).
- Close the battery compartment cover securely.

Figure 2.1: Battery compartment on the underside of the keyboard.
2.2. Bluetooth Pairing
The keyboard supports up to three Bluetooth connections, allowing you to switch between devices easily.
- Turn on the keyboard using the On/Off switch, usually located on the top right edge.
- Select a Bluetooth channel (BT1, BT2, or BT3) by holding down the Fn key and pressing 1, 2, or 3 for 2 seconds. The indicator light will flash, indicating pairing mode.
- On your device (PC, laptop, tablet, or smartphone), navigate to Bluetooth settings and search for available devices.
- Select the keyboard's name (e.g., "UBOTIE Keyboard" or similar) from the list to connect.
- Once connected, the indicator light on the keyboard will stop flashing.

Figure 2.2: Bluetooth pairing instructions.
2.3. Switching Between Devices
To switch between paired devices, simply press the Fn key along with the corresponding channel number (1, 2, or 3) that your device is paired to. The keyboard will quickly re-connect to the selected device.
3. Operating
3.1. General Usage
The UBOTIE keyboard functions like a standard QWERTY keyboard. Its compact 84-key layout includes all essential keys for typing and navigation.

Figure 3.1: UBOTIE Portable Bluetooth Keyboard.
3.2. Function Keys (Fn Combinations)
The keyboard features function keys (F1-F12) that can be accessed by holding the Fn key and pressing the desired function key. These keys provide shortcuts for media control, volume adjustment, and other system functions.
- Fn + Q: For Android devices.
- Fn + W: For Windows devices.
- Fn + E: For iOS/Mac devices.
- Fn + F1-F12: Media controls, volume, screen brightness (functions may vary by operating system).

Figure 3.2: Close-up of keyboard keys.
3.3. Compatibility
The keyboard is designed for broad compatibility:
- Windows: Compatible with Windows PCs and laptops. Note: Some older Windows PCs may require a Bluetooth adapter (not included) if they lack built-in Bluetooth.
- Mac OS: Fully compatible with Mac computers.
- iOS: Works seamlessly with iPhones and iPads.
- Android: Compatible with Android smartphones and tablets.

Figure 3.3: Keyboard in use with a laptop.

Figure 3.4: Keyboard paired with a tablet.
4. Maintenance
4.1. Cleaning the Keyboard
To maintain the keyboard's appearance and functionality, regular cleaning is recommended. The round keycaps can be removed for thorough cleaning.
- Turn off the keyboard and remove the batteries.
- Gently pull up on each keycap to remove it. A keycap puller (not included) can be used for easier removal.
- Use a soft, dry cloth or a small brush to remove dust and debris from the keyboard base and between the switches.
- Clean the keycaps with a damp cloth and mild soap if necessary, then dry them completely before reattaching.
- Align each keycap with its corresponding switch and press down firmly until it clicks into place.

Figure 4.1: Keyboard with keycaps removed for cleaning.
4.2. Battery Care
To maximize battery life and prevent issues:
- Use high-quality AAA alkaline batteries.
- Replace both batteries simultaneously when they are depleted.
- If the keyboard will not be used for an extended period, remove the batteries to prevent leakage.
- The keyboard features an auto-sleep function to conserve power when idle.
5. Troubleshooting
If you encounter issues with your UBOTIE keyboard, please refer to the following common solutions:
5.1. Connectivity Issues
- Keyboard not connecting: Ensure the keyboard is turned on and batteries are correctly installed and charged. Re-initiate pairing mode by holding Fn + 1/2/3 for 2 seconds.
- Bluetooth not found on device: Make sure your device's Bluetooth is enabled and discoverable. Try restarting your device's Bluetooth function.
- Frequent disconnections: This can sometimes be due to low battery. Replace the batteries. Ensure the keyboard is within the 10-meter Bluetooth range and there are no significant obstructions or strong interference sources (e.g., Wi-Fi routers, other wireless devices).
- Windows PC connectivity: If your Windows PC does not have built-in Bluetooth or an older version, you may need a separate Bluetooth adapter (dongle) for stable connection.
5.2. Keys Not Responding
- Specific keys not working: Check if any debris is lodged under the keycap. Remove the keycap and clean the area. Re-seat the keycap firmly.
- All keys not working: Ensure the keyboard is connected via Bluetooth. Check battery levels and replace if necessary. Try turning the keyboard off and on again.
5.3. Lag or Input Delay
- Ensure your device's operating system is up to date.
- Minimize other active Bluetooth connections on your device.
- Move closer to your device to ensure a strong Bluetooth signal.
6. Specifications
| Feature | Detail |
|---|---|
| Brand | UBOTIE |
| Model Number | SK-621BT |
| Product Dimensions | 12.6 x 5.7 x 0.99 inches |
| Item Weight | 1.34 pounds |
| Connectivity Technology | Bluetooth |
| Keyboard Description | Membrane Round Key Colorful Wireless Keyboard Bluetooth |
| Number of Keys | 84 |
| Power Source | 2 AAA batteries (required) |
| Compatible Devices | Laptop, PC, Tablet (Windows, Mac OS, iOS, Android) |
| Style | Vintage |
| Color | Purple-colorful |
| Country of Origin | China |
7. Warranty and Support
This UBOTIE product comes with a one-year new product service warranty. Should you encounter any problems or require assistance, please do not hesitate to consult our 24-hour service team. We are committed to providing a satisfactory solution for any issues you may experience.
For support, please refer to the contact information provided with your purchase or visit the official UBOTIE website.
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