1. Introduction
Welcome to the user manual for your UGREEN Wireless Bluetooth Keyboard. This manual provides detailed instructions on setting up, operating, maintaining, and troubleshooting your keyboard to ensure optimal performance and a seamless user experience.
2. Product Overview
The UGREEN Wireless Bluetooth Keyboard is designed for versatility and comfort, offering multiple connectivity options and an ergonomic design for efficient typing across various devices.
Key Features
- Dual Connectivity: Supports both Bluetooth 5.0 and 2.4G wireless technology, allowing connection to up to 4 devices simultaneously.
- Quiet & Precise Typing: Features a scissor-structure key mechanism for a comfortable, quiet, and accurate typing experience.
- Long Battery Life: Equipped with a built-in 400mAh rechargeable battery, providing up to 3 months of usage on a single charge (usage dependent).
- Ergonomic Design: An optimal 6-degree tilt angle reduces wrist strain for extended typing sessions.
- Compact 99-Key Layout: Includes 12 function keys and a full numeric keypad, saving desk space while maintaining full functionality.
- Wide Compatibility: Compatible with macOS, Windows, Linux, ChromeOS, iOS, and Android operating systems.
Package Contents
- UGREEN Wireless Bluetooth Keyboard
- USB-C Charging Cable

3. Setup
Charging the Keyboard
Before first use, ensure the keyboard is fully charged. Connect the provided USB-C cable to the keyboard's charging port and the other end to a USB power source (e.g., computer USB port, USB wall adapter).

Connecting to Devices
The UGREEN keyboard supports simultaneous connection to up to 4 devices using either 2.4G wireless or Bluetooth 5.0 technology.
3.1. 2.4G Wireless Connection
- Locate the 2.4G USB receiver (usually stored in the keyboard's battery compartment or included separately).
- Insert the 2.4G USB receiver into an available USB port on your computer or device.
- Press Fn + 1 (with the 2.4G icon) on the keyboard to switch to 2.4G mode. The indicator light will confirm the connection.
3.2. Bluetooth Connection (BT1, BT2, BT3)
- Press Fn + 2 (BT1 icon), Fn + 3 (BT2 icon), or Fn + 4 (BT3 icon) to select an available Bluetooth channel. The indicator light for the selected channel will blink rapidly, indicating that the keyboard is in pairing mode.
- On your device (computer, tablet, smartphone), navigate to the Bluetooth settings.
- Search for available devices and select "UGREEN Keyboard" from the list.
- Follow any on-screen prompts to complete the pairing process. The indicator light will become solid once connected.

4. Operating Instructions
4.1. Switching Between Connected Devices
To switch between your connected devices, simply press the corresponding function key combination:
- For 2.4G connection: Press Fn + 1
- For Bluetooth 1 connection: Press Fn + 2
- For Bluetooth 2 connection: Press Fn + 3
- For Bluetooth 3 connection: Press Fn + 4
4.2. Multimedia and Function Keys
The keyboard features 12 multimedia shortcut keys for quick access to common functions. To use these, press the Fn key in combination with the desired F1-F12 key.
| Key Combination | Function |
|---|---|
| Fn + F1 | Brightness Down |
| Fn + F2 | Brightness Up |
| Fn + F3 | App Switch |
| Fn + F4 | Close Window |
| Fn + F5 | Refresh |
| Fn + F6 | PC Power On |
| Fn + F7 | Previous Track |
| Fn + F8 | Play/Pause |
| Fn + F9 | Next Track |
| Fn + F10 | Mute |
| Fn + F11 | Volume Down |
| Fn + F12 | Volume Up |

4.3. System Compatibility and Layout Switching
The keyboard is designed to be compatible with various operating systems. The default keyboard layout is set for Windows.
- To switch to Windows/Android layout: Press Fn + Q
- To switch to macOS/iOS layout: Press Fn + W

4.4. Ergonomic Design
The keyboard features a 6-degree tilt angle, which is designed to provide a more natural and comfortable typing position, reducing strain on your wrists during prolonged use.

4.5. Quiet Typing Experience
The scissor-structure keys provide a tactile yet quiet typing experience, making it ideal for environments where noise reduction is important.

5. Maintenance
5.1. Cleaning
To clean your keyboard, gently wipe the surface with a soft, dry, lint-free cloth. For stubborn dirt, slightly dampen the cloth with water. Avoid using harsh chemicals, abrasive cleaners, or excessive moisture, as these can damage the keyboard.
5.2. Battery Care
To maximize the lifespan of your keyboard's battery:
- Recharge the keyboard when the battery indicator light signals low power.
- Avoid fully discharging the battery frequently.
- Do not expose the keyboard to extreme temperatures (hot or cold).
- If storing the keyboard for an extended period, charge it to about 50% before storage.
6. Troubleshooting
6.1. Keyboard Not Connecting or Responding
- Check Battery: Ensure the keyboard has sufficient battery charge. Recharge if necessary.
- Correct Channel: Verify that the keyboard is switched to the correct channel (Fn + 1/2/3/4) for the device you are trying to use.
- 2.4G Receiver: For 2.4G connection, ensure the USB receiver is securely plugged into your device's USB port. Try a different USB port.
- Bluetooth Pairing: For Bluetooth, ensure Bluetooth is enabled on your device and the keyboard is in pairing mode (blinking indicator light). If already paired, try unpairing and re-pairing the keyboard.
- Restart Keyboard: Turn the keyboard off and then on again using the power switch.
- Device Restart: Restart your computer or device.
6.2. Keys Not Working or Sticking
- Battery Level: Low battery can sometimes cause inconsistent key responses. Charge the keyboard.
- Clean Keys: Check for any debris or foreign objects under the keys. Gently clean the keys as described in the Maintenance section.
- System Layout: Ensure the keyboard layout is correctly set for your operating system (Fn + Q for Windows/Android, Fn + W for macOS/iOS).
6.3. Keyboard Enters Sleep Mode Frequently
The keyboard is designed to enter sleep mode after 30 minutes of inactivity to conserve battery power. To wake it up, simply press any key and wait for approximately 3 seconds for it to reconnect.
7. Specifications
| Feature | Detail |
|---|---|
| Brand | UGREEN |
| Model | 35075 |
| Connectivity Technology | Bluetooth 5.0, 2.4Ghz Wireless |
| Battery Type | Lithium-Polymer |
| Battery Capacity | 400mAh |
| Charging Time | Approx. 2 hours |
| Battery Life | Up to 3 months (depending on usage) |
| Dimensions (L x W x H) | 36.5 x 12.3 x 0.71 cm |
| Weight | 710 g |
| Number of Keys | 99 |
| Optimal Tilt Angle | 6 degrees |
| Compatible Devices | Laptop, PC, Smartphone, Tablet |
| Compatible Operating Systems | macOS, Windows, Linux, ChromeOS, iOS, Android |

8. Warranty and Support
For detailed warranty information, technical support, and customer service, please refer to the official UGREEN website or contact their authorized support channels. It is recommended to keep your purchase receipt as proof of purchase for any warranty claims.







