Introduction
Thank you for choosing our True Wireless Bluetooth 5.49 Earphones, Model D4. These semi in-ear earphones are designed to provide a superior audio experience with advanced features such as a 72-hour battery life (with charging case), HIFI sound quality, and dual-microphone call noise reduction. This manual will guide you through the setup, operation, and maintenance of your new earphones to ensure optimal performance.
Package Contents
Before you begin, please check the package contents to ensure all items are present:
- 2 x Earphones
- 1 x Charging Case
- 1 x Type-C Charging Cable
- 1 x Instruction Manual (this document)
Setup Guide
1. Charging the Earphones and Case
Before first use, fully charge the earphones and charging case. The charging case features a Type-C port for convenient charging. A full charge for the case typically takes approximately 2 hours. The earphones will charge automatically when placed inside the powered charging case.
2. Powering On/Off
- To power on: Press and hold the touch area on both earphones for more than 3 seconds.
- To power off: Press and hold the touch area on both earphones for more than 3 seconds. Alternatively, place them back into the charging case.
3. Bluetooth Pairing
Follow these steps to pair your earphones with your device:
- Ensure both earphones are powered on. They will flash, indicating they are searching for each other.
- The two earphones will automatically pair with each other. Once paired, only one earphone will continue to flash, indicating it's ready to connect to your device.
- On your smartphone or Bluetooth-enabled device, go to the Bluetooth settings.
- Search for available devices and select "TWS" from the list.
- Once connected, the flashing light on the earphone will stop, and you will hear a confirmation sound.
The earphones are compatible with both Apple and Android systems, as well as other Bluetooth-enabled devices like tablets.
Operating Instructions
Touch Controls
Your earphones feature multi-functional touch controls for easy management of music playback, calls, and voice assistant activation. The touch position is typically on the outer surface of the earbud.
- Click once: Play/Pause music, Answer/Hang up phone calls.
- Touch twice: Increase/Decrease volume.
- Touch 3 times: Skip to Previous/Next Song.
- Long press for 1 second: Wake up your phone's voice assistant.
Call Noise Reduction
The earphones are equipped with Dual MIC call noise reduction technology. This feature helps to extract your voice clearly while reducing external interference, ensuring clear communication during calls.
Sound Quality
Experience top-notch sound effects with Hi-Res Audio Wireless support. The earphones feature a 13mm vibrating ring composite speaker, delivering dual ear stereo sound that restores the original audio quality across an audible range of 20Hz to 40KHz.
Maintenance
To ensure the longevity and optimal performance of your earphones, follow these maintenance guidelines:
- Cleaning: Gently wipe the earphones and charging case with a soft, dry, lint-free cloth. Do not use harsh chemicals or abrasive materials.
- Storage: When not in use, store the earphones in their charging case to protect them from dust and damage.
- Avoid Moisture: Keep the earphones and charging case dry. Do not expose them to water or excessive humidity.
- Temperature: Avoid extreme temperatures, both hot and cold, as they can affect battery life and overall performance.
Troubleshooting
If you encounter any issues with your earphones, please refer to the following common troubleshooting steps:
- Earphones not pairing with each other: Ensure both earphones are fully charged and powered on. Place them back in the case, close it, then open it again to reset the connection.
- Earphones not connecting to device: Make sure Bluetooth is enabled on your device and the earphones are in pairing mode (one earphone flashing). Forget the device "TWS" from your device's Bluetooth list and try pairing again.
- No sound from one earphone: Check if both earphones are charged and connected. Try resetting them by placing them in the case and then taking them out.
- Charging issues: Ensure the Type-C cable is securely connected to both the case and the power source. Try a different cable or power adapter.
- Low volume or poor sound quality: Check the volume levels on both your device and the earphones. Ensure the earphones are clean and properly seated in your ears.
Specifications
| Feature | Specification |
|---|---|
| Model | D4 |
| Wireless (BT) Name | TWS |
| Bluetooth Version | 5.49 |
| Connection Distance | ≤10 meters |
| Compatible System | Apple/Android |
| Charging Port | Type-C |
| Fast Charging Support | No |
| Earphone Battery Capacity | 200mAh |
| Total Battery Life (with case) | Up to 72 hours |
| Charging Time | Approx. 2 hours |
| Earphone Standby Time | Approx. 30 hours |
| Support Protocols | HFP/A2DP/HSP/AVRCP |
| Material | Plastic |
| Volume Control | Yes (via touch control) |
| Control Button | No (physical buttons) |
| Vocalism Principle | Dynamic |
| Certification | FCC |
| Origin | Mainland China |
| Single Earphone Weight | 3.7g |
| Case Dimensions (H x W) | 4.5cm x 4.5cm (1.77in x 1.77in) |
| Speaker | 13mm vibrating ring composite speaker |
User Tips
- Comfortable Fit: The earphones are designed to be lightweight (3.7g per earphone) and comfortable for long-term wear. Experiment with the fit to find the most secure and comfortable position in your ears for optimal sound and stability.
- Verify Package Contents: Upon receiving your product, always double-check that you have received both earphones and the charging case, along with the charging cable and manual, as some users inquire about the completeness of the package.
- Maximize Battery Life: Always store your earphones in the charging case when not in use to keep them charged and protected, extending their overall battery life.
- Voice Assistant: Utilize the long-press touch control to quickly access your phone's voice assistant for hands-free commands.
Warranty and Support
For any product-related inquiries, technical support, or warranty claims, please contact the seller directly through the platform where you purchased the product. Please retain your proof of purchase for any warranty services.
