1. Introduction
The EOENKK X55 Sleeping Earbuds are designed for comfort and high-quality audio, featuring a mini, invisible design ideal for use during sleep, work, or sports. These TWS (True Wireless Stereo) Bluetooth earphones offer stable connectivity, clear calls, and active noise cancellation, all within a waterproof and ultra-thin form factor.

Figure 1: X55 Sleeping Earbuds and Charging Case
2. Package Contents
- X55 Sleeping Earbuds (Left and Right)
- Charging Case
- Charging Cable (Type-C)
- User Manual
3. Setup
3.1 Charging the Earbuds and Case
- Connect the provided Type-C charging cable to the charging port on the case.
- Connect the other end of the cable to a DC5V/1A power source.
- The LED intelligent power display on the charging case will show the battery percentage.
- A full charge takes approximately 1.5 hours.
- Ensure earbuds are placed correctly in the charging case for them to charge.

Figure 2: Charging Case with LED Display
3.2 Pairing with a Bluetooth Device
- Ensure the earbuds are charged.
- Open the charging case. The earbuds will automatically enter pairing mode.
- On your device (smartphone, tablet, etc.), enable Bluetooth.
- Search for "X55" in the list of available Bluetooth devices.
- Select "X55" to connect. Once connected, you will hear a confirmation tone.
- The earbuds feature Bluetooth 5.3 for a stable and low-power connection.

Figure 3: Bluetooth 5.3 Intelligent Low-Power Chip
3.3 Wearing the Earbuds
The X55 earbuds are designed to be ultra-thin (approx. 10mm) and invisible, providing a painless wearing experience, especially for side sleepers.
- Gently insert each earbud into your ear canal.
- Adjust for a snug and comfortable fit. The ergonomic design ensures they stay securely in place without causing pressure, even when lying on your side.

Figure 4: Earbud designed for side-lying comfort

Figure 5: Small and comfortable design
4. Operating Instructions
4.1 Basic Controls (Smart Touch)
The X55 earbuds feature smart touch controls for easy management of audio and calls. Specific touch gestures may vary slightly, but common functions include:
- Play/Pause: Single tap on either earbud.
- Next Track: Double tap on the right earbud.
- Previous Track: Double tap on the left earbud.
- Answer/End Call: Single tap on either earbud during an incoming call.
- Reject Call: Press and hold either earbud for 2 seconds during an incoming call.
- Activate Voice Assistant: Triple tap on either earbud.
- Volume Control: (If supported) Long press left for volume down, long press right for volume up. Refer to specific product documentation for exact gestures.
4.2 Call Functions
The earbuds are equipped with a microphone and intelligent noise reduction for HD calls, ensuring clear communication with minimal delay.
- HD Call: Enjoy clear voice quality during phone calls.
- Intelligent Noise Reduction: Minimizes background noise for clearer conversations.
- Voice Call '0' Delay: Designed for real-time audio transmission during calls.
- Call Voice Assistant: Easily access your device's voice assistant for hands-free control.
4.3 Active Noise Cancellation (ANC)
The X55 earbuds feature Active Noise Cancellation to reduce ambient noise, allowing for a more immersive listening experience or undisturbed sleep.
4.4 Dual Connection
The earbuds support dual connection, allowing them to be paired with two devices simultaneously (e.g., a phone and a laptop), enabling seamless switching between audio sources.
5. Maintenance
5.1 Cleaning
- Regularly clean the earbuds and charging case with a soft, dry, lint-free cloth.
- Do not use abrasive cleaners, alcohol, or chemical solvents.
- For earwax buildup, gently clean the earbud mesh with a small, soft brush.
5.2 Storage
- When not in use, always store the earbuds in their charging case to protect them and keep them charged.
- Store in a cool, dry place away from extreme temperatures and direct sunlight.
5.3 Waterproofing
The X55 earbuds are waterproof. While they can withstand sweat and light splashes, avoid submerging them in water or exposing them to heavy rain for extended periods. Ensure they are dry before placing them back in the charging case to prevent damage.
6. Troubleshooting
6.1 Earbuds Not Pairing
- Ensure both earbuds are charged and removed from the charging case.
- Turn off Bluetooth on your device and then turn it back on.
- Forget/delete "X55" from your device's Bluetooth list and try pairing again.
- If issues persist, try resetting the earbuds (refer to specific reset instructions if available, or place them back in the case, close, then reopen).
6.2 No Sound or Low Volume
- Check the volume levels on both your device and the earbuds.
- Ensure the earbuds are properly connected to your device.
- Clean any debris from the earbud mesh that might be obstructing sound.
- Try playing audio from a different application or device.
6.3 Charging Issues
- Ensure the charging cable is securely connected to both the case and the power source.
- Try using a different Type-C cable and power adapter.
- Verify that the charging contacts on the earbuds and inside the case are clean and free of debris.
7. Specifications
| Feature | Specification |
|---|---|
| Model | X55 |
| Brand | EOENKK |
| Material | Plastic |
| Category | Earphones & Headphones |
| Wireless Type | Bluetooth |
| Bluetooth Version | 5.3 |
| Communication | Wireless |
| Transmission Distance | ≤10 meters |
| Vocalism Principle | Dynamic |
| Active Noise-Cancellation | Yes |
| With Microphone | Yes |
| Control Button | Yes (Smart Touch) |
| Volume Control | Yes |
| Waterproof | Yes |
| Support APP | No |
| Earbud Battery Capacity | 35 mAh |
| Charging Case Battery Capacity | 350 mAh |
| Charging Time | About 1.5 hours |
| Charging Voltage | DC5V/1A |
| Case Dimensions (L*W*H) | 6.5cm * 4.5cm * 2cm |
| Weight | 0.047 kg (approx.) |
| Certification | FCC |
| Origin | Mainland China |

Figure 6: Key Features of X55 Earbuds
8. User Tips
- For Side Sleepers: The ultra-thin design is specifically made to be comfortable when lying on your side. Ensure the earbud is properly seated to avoid discomfort.
- Stable Connection: Bluetooth 5.3 provides a strong and stable connection. Keep your paired device within the 10-meter transmission distance for optimal performance.
- Clear Calls: Utilize the intelligent noise reduction feature for clearer calls, especially in noisy environments.
- Battery Management: Regularly check the LED display on the charging case to monitor battery levels and ensure your earbuds are always ready for use.
9. Warranty and Support
For any product-related inquiries, technical support, or warranty claims, please contact the seller or retailer from whom you purchased the X55 Sleeping Earbuds. Please retain your proof of purchase for warranty service.