1. Introduction
The UGREEN FitBuds Open-Ear Headphones (Model WS213) are true wireless stereo (TWS) earbuds designed for comfortable, open-ear listening. Featuring Bluetooth 6.0 technology, these ear-hook headphones provide stable connectivity, spatial audio effects, and a low-latency experience, making them suitable for various activities from daily commutes to workouts. With an IPX5 water-resistant rating and a long battery life, the FitBuds are built for seamless performance in diverse environments.
2. Package Contents
Please check the package for the following items:
- UGREEN FitBuds Open-Ear Headphones (Left and Right earbuds)
- Charging Case
- USB-C Charging Cable
- User Manual

3. Product Overview
The UGREEN FitBuds are designed with an AdaptiveFit™ Technology for a lightweight and ultra-stable fit, utilizing medical-grade silicone and a memory alloy core to adapt to various ear sizes. They feature 11MM*18MM Dynamic Bio Diaphragm Speakers for immersive sound and 4 microphones for clear calls.
3.1 Earbud Components


3.2 Dimensions

4. Setup
4.1 Initial Charging
Before first use, fully charge your UGREEN FitBuds and their charging case.
- Place the earbuds into the charging case.
- Connect the charging case to a power source using the provided USB-C cable.
- The indicator light on the case will show charging status.
- A full charge for the earbuds takes approximately 1.5 hours.
- A full charge for the charging case takes approximately 2 hours.
- A quick 10-minute charge can provide up to 2 hours of listening time.

4.2 Bluetooth Pairing
- Open the charging case. The earbuds will automatically enter pairing mode.
- On your device (smartphone, tablet, etc.), enable Bluetooth.
- Search for "UGREEN FitBuds" in the list of available Bluetooth devices.
- Select "UGREEN FitBuds" to connect. Once connected, you will hear an audible confirmation.
5. Wearing Instructions
The FitBuds are designed for an easy and secure fit. Follow these steps for optimal comfort and sound quality:
- Step 1: Take out the earbuds from the charging case and identify the "L" (Left) and "R" (Right) markings.
- Step 2: Gently rotate the ear hooks along your outer ear and position the earbud comfortably in your ear.
- Step 3: Adjust until the earbud feels secure and comfortable.

6. Operating Instructions
6.1 Touch Controls
The UGREEN FitBuds feature intuitive touch controls on each earbud:
| Action | Gesture |
|---|---|
| Play/Pause | R/L Tap x2 |
| Next Song | R Hold 1s |
| Previous Song | L Hold 1s |
| Answer/Hang Up Call | R/L Tap x2 |
| Reject Call | R/L Hold x1s |
| Activate Voice Assistant | R/L Tap x3 |
| Game/Music Mode Toggle | R/L Tap x3 |

6.2 UGREEN App Functions
Enhance your experience by connecting your FitBuds to the UGREEN App. The app allows you to:
- Check the battery level of each earbud and the charging case.
- View the connection status.
- Select various EQ sound effects to customize your audio.
- Customize your settings for personalized use.
- Use the "Find your earbuds" feature.
- Turn on/off spatial sound effects.

7. Maintenance
- Cleaning: Regularly wipe the earbuds and charging case with a soft, dry cloth to remove dust and debris. Avoid using harsh chemicals or abrasive materials.
- Water Resistance: The FitBuds are IPX5 water-resistant, meaning they can withstand sweat and light splashes of water. Do not submerge them in water or expose them to heavy rain. Ensure they are dry before placing them back in the charging case.
- Storage: When not in use, store the earbuds in their charging case to protect them and keep them charged. Store in a cool, dry place away from extreme temperatures.
- Battery Care: To prolong battery life, avoid fully discharging the earbuds and charging case frequently. Charge them regularly, even if not in constant use.
8. Troubleshooting
8.1 Common Issues and Solutions
- Earbuds not pairing: Ensure both earbuds are in the charging case, then open the lid to initiate pairing mode. Check your device's Bluetooth settings and try reconnecting. If issues persist, try resetting the earbuds (refer to the UGREEN App or official support for specific reset instructions).
- No sound or poor sound quality: Check the volume levels on both your device and the earbuds. Ensure the earbuds are properly seated in your ears. Clean any debris from the sound output area. Try disconnecting and reconnecting the Bluetooth connection.
- Charging issues: Ensure the USB-C cable is securely connected to both the charging case and the power source. Check if the charging contacts on the earbuds and inside the case are clean and free of obstruction. Try a different charging cable or power adapter.
- Low latency issues (e.g., audio delay in games): Ensure you have activated the Game Mode via the touch controls (R/L Tap x3) or through the UGREEN App.
8.2 Dual Connection
Some users inquire about dual connection capabilities. The UGREEN FitBuds are designed for a single, stable connection to one device at a time. For switching between devices, disconnect from the current device and then connect to the new device.
9. Specifications
| Feature | Specification |
|---|---|
| Product Name | UGREEN FitBuds |
| Model | WS213 |
| Bluetooth Version | 6.0 |
| Transmission Distance | 10m / 32.81ft Max (no blocking) |
| Codecs | AAC/SBC |
| Frequency Band | 2400MHz-2483.5MHz |
| Max. RF Output Power | 4dBm |
| Bluetooth Profile | HFP/AVRCP/A2DP/BLE/SPP |
| Frequency Response | 20Hz-20kHz |
| Charging Port | USB-C |
| Earbuds Capacity | 60mAh 3.7V (each) |
| Charging Case Capacity | 500mAh 3.7V |
| Charging Case Battery Type | Polymer lithium-ion battery |
| Charge Earbuds Time | About 1.5 hours |
| Charge Charging Case Time | About 2 hours |
| Single Charge Operating Time | About 8 hours |
| Total Operating Time (with case) | About 28 hours |
| Water Resistance | IPX5 |
| Material | Metal, Silica Gel |
| Weight | 8.7g (single bud) |

10. User Tips
- Awareness: As open-ear headphones, the FitBuds allow you to hear your surroundings. This is a safety feature, especially when exercising outdoors or in busy environments.
- Optimal Fit: Experiment with the ear hook positioning to find the most comfortable and secure fit for your ear shape. A good fit ensures the best sound delivery and minimizes sound leakage.
- App Customization: Utilize the UGREEN App to explore different EQ settings and spatial audio options to tailor the sound to your preferences and the content you are listening to.
- Gaming Experience: For competitive gaming, remember to activate the low-latency Game Mode via the touch controls or the app to minimize audio delay.
11. Warranty and Support
UGREEN products are designed to meet high-quality standards. For warranty information, technical support, or any questions regarding your UGREEN FitBuds, please refer to the official UGREEN website or contact their customer service directly. Keep your proof of purchase for warranty claims.