Introduction
The E90 True Wireless Bluetooth Headset is designed to provide a superior audio experience with its advanced features. Utilizing a Bluetooth 5.3 chip, it ensures improved transmission speed and stable connectivity. Key functionalities include automatic pairing after booting, a built-in active noise reduction IC for clear audio, and a high-definition microphone for calls. Its large-capacity battery ensures long-lasting performance, making it ideal for various uses from daily commutes to sports activities.

Image: White E90 Wireless Earbuds securely placed within their transparent charging case, displaying digital battery indicators.
Key Features
- Advanced Bluetooth 5.3 Technology: Ensures stable and fast wireless connection with low power consumption.
- Touch-Control Design: Intuitive touch controls for managing phone calls and music playback.
- High-Definition Microphone: Built-in HD and sensitivity microphone for clear communication.
- Active Noise Reduction IC: Enhances audio clarity by reducing ambient noise.
- Automatic Pairing: Earbuds automatically pair after initial setup, providing a hassle-free listening experience.
- IPX4 Waterproof Rating: Offers protection against splashes and sweat, suitable for sports and outdoor activities.
- Long Battery Life: Up to 6 hours of audio playback at full volume, with the charging case extending total playtime to 3 days.
- Compact and Ergonomic Design: Mini, lipstick-style design for comfortable wear in both ears.
Setup and First Use
Charging the Earbuds and Case
Before first use, ensure both the earbuds and the charging case are fully charged. Connect the provided charging cable to the charging port on the case and a suitable USB power source. The LED digital display on the charging case will indicate the charging status and battery levels for both the case and individual earbuds (L for left, R for right). A full charge for the earbuds takes approximately 40 minutes, and the charging case provides extended playtime up to 72 hours.

Image: A green E90 Wireless Earbuds charging case with a clear LED digital display showing battery levels for both the case and individual earbuds.
Pairing with Your Device
- Ensure your E90 Wireless Earbuds are charged.
- Open the charging case. The earbuds will automatically enter pairing mode.
- On your smartphone, tablet, or computer, navigate to the Bluetooth settings.
- Search for available devices and select "E90" from the list.
- Once connected, the earbuds will automatically pair with this device in the future when removed from the case.
The earbuds are compatible with all Bluetooth-enabled devices and offer a connection range of up to 33 feet (10 meters).

Image: Green E90 Wireless Earbuds next to a smartphone displaying a game, illustrating low latency for an enhanced gaming experience.
Operating the Earbuds
Touch Controls
The E90 Wireless Earbuds feature intuitive touch controls for easy management of calls and music. Specific touch gestures for various functions are detailed below:
- 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 on either earbud during an incoming call.
- Activate Voice Assistant: Triple tap on either earbud.
These touch-sensitive areas allow for seamless interaction without needing to access your connected device.

Image: Black E90 Wireless Earbuds, one placed outside its charging case, highlighting their sleek design and compact form factor.
Maintenance and Care
To ensure the longevity and optimal performance of your E90 Wireless Earbuds, follow these maintenance guidelines:
- Cleaning: Regularly clean the earbuds and charging case with a soft, dry, lint-free cloth. Avoid using abrasive materials or harsh chemicals.
- Water Resistance: The earbuds have an IPX4 waterproof rating, meaning they are resistant to splashing water from any direction. They are suitable for light rain or sweaty workouts but should not be submerged in water. Dry them thoroughly if they get wet.
- Storage: When not in use, store the earbuds in their charging case to protect them from dust and damage. Store in a cool, dry place away from extreme temperatures.
- Battery Care: To preserve battery life, avoid fully discharging the earbuds and charging case frequently. Charge them regularly, even if not in constant use.

Image: Black E90 Wireless Earbuds and their charging case resting on a turntable, showcasing their compact and stylish design.
Troubleshooting
If you encounter any issues with your E90 Wireless Earbuds, please refer to the following common troubleshooting steps:
- No Sound/Poor Sound Quality:
- Ensure earbuds are fully charged.
- Check Bluetooth connection on your device; try re-pairing.
- Clean any debris from the earbud speakers.
- Adjust volume on both the earbuds and your connected device.
- Earbuds Not Pairing:
- Place both earbuds back into the charging case, close the lid, wait a few seconds, then open it again to re-initiate pairing mode.
- Ensure Bluetooth is enabled on your device and the earbuds are within range (10 meters).
- Forget the "E90" device from your device's Bluetooth settings and try pairing again.
- Charging Issues:
- Ensure the charging cable is securely connected to both the 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.
For persistent issues, please contact customer support.
Specifications
| Feature | Detail |
|---|---|
| Model Name | E90 |
| Brand | Generic |
| Connectivity Technology | Wireless (Bluetooth 5.3) |
| Bluetooth Range | 10 Meters (33 feet) |
| Battery Life (Earbuds) | 6 Hours (audio playback) |
| Battery Capacity (Earbuds) | 50mAh Lithium Polymer |
| Charging Time (Earbuds) | 40 minutes |
| Carrying Case Battery Life | 72 Hours (total playtime) |
| Water Resistance Level | IPX4 Waterproof |
| Control Method | Touch |
| Noise Control | Active Noise Cancellation |
| Ear Placement | In Ear |
| Form Factor | In Ear |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Item Weight | 2.68 ounces |
| Package Dimensions | 5.39 x 3.39 x 1.42 inches |
| Frequency Response | 1 Hz - 20,000 Hz |
| Sensitivity | 105 dB |
| Headphones Jack | 2.5 mm Jack (for wired connection, if applicable) |
| Compatible Devices | Computers, Telephones |
| Recommended Uses | Personal, Business, Running |
What's in the Box
Your E90 Wireless Earbuds package includes the following items:
- E90 Wireless Earbuds (Left and Right)
- Wireless Charging Case
- Charging Cable
- User Manual (this document)
Official Product Video
Video: Official product video for the E90 Wireless Earbuds, showcasing key features, design, compatibility, and battery life.
Warranty and Support
For warranty information and customer support, please refer to the product packaging or contact the manufacturer directly. Keep your purchase receipt as proof of purchase for any warranty claims.
For further assistance or to explore more products, please visit the official product page on Amazon.com.







