1. Product Overview
The hadbleng Q28S Wireless Bluetooth 5.3 Earbuds are designed for active lifestyles, featuring secure earhooks, IPX7 waterproofing, and an LED display charging case. They offer high-fidelity audio and clear call quality for various activities.

Image: hadbleng Q28S Wireless Bluetooth Earbuds shown open in their charging case, displaying the LED battery indicator.
2. Package Contents
Please check the package for the following items:
- 2 x hadbleng Q28S Wireless Earbuds
- 1 x Charging Case
- 1 x Mini USB Type-C Charging Cable
- 6 x Ear Caps (S/M/L sizes)
- 1 x User Manual (this document)
3. Product Features
- Bluetooth 5.3 Technology: Ensures stable connectivity, longer transmission range, lower power consumption, and reduced latency.
- High-Fidelity Audio: Equipped with 13.44mm speakers and a triple-layer composite membrane for powerful bass (down to 16Hz) and clear treble (up to 20kHz).
- Clear Calls: Built-in microphone with Environmental Noise Cancellation (ENC) for enhanced call clarity.
- Extended Playtime: Up to 60 hours of total playtime with the charging case. Each earbud provides approximately 6 hours of battery life.
- Fast Charging: Type-C fast charging support for the charging case.
- Dual LED Digital Display: Charging case displays remaining battery level, and LED strips will indicate individual earbud charging status.
- IPX7 Waterproof: Designed to withstand splashes and rain, suitable for workouts and outdoor activities.
- Ergonomic Design: Flexible silicone ear hooks and three sizes of eartips (S/M/L) provide a secure and comfortable fit.
- One-Button Control: Easy-to-use physical buttons for media control and call management.
- Automatic Pairing: Earbuds automatically connect to the last paired device when removed from the charging case.
4. Setup
4.1 Charging the Earbuds and Case
Before first use, fully charge the earbuds and charging case. Place the earbuds into the charging case. Connect the Type-C charging cable to the case and a power source. The LED display on the case will show the battery percentage, and LED strips will indicate the charging status of each earbud.

Image: Diagram illustrating the battery life and charging capabilities of the hadbleng Q28S earbuds and their 800mAh charging case, including Type-C fast charging.
4.2 Initial Pairing
- Ensure earbuds are charged and removed from the case.
- Open the charging case. The earbuds will automatically power on and enter pairing mode.
- On your device (smartphone, tablet, etc.), enable Bluetooth.
- Search for "Q28S" in the list of available Bluetooth devices and select it to connect.
- Once connected, a voice prompt will confirm successful pairing.
After the initial pairing, the earbuds will automatically connect to your device when you open the case and remove them.

Image: Visual guide demonstrating the one-step auto-pairing feature of the Q28S earbuds. Opening the case powers them on and connects them, while closing the case disconnects and powers them off.
Video: An official overview of the hadbleng Q28S Wireless Bluetooth Earbuds, highlighting key features and functionality.
5. Operating Instructions
5.1 Music Playback Controls
- Play/Pause: Single press the button on either earbud.
- Next Track: Double press the button on the right earbud.
- Previous Track: Double press the button on the left earbud.
- Volume Up: Triple press the button on the right earbud.
- Volume Down: Triple press the button on the left earbud.
5.2 Call Management
- Answer/End Call: Single press the button on either earbud.
- Reject Call: Press and hold the button on either earbud for 2 seconds.
- Activate Voice Assistant: Press and hold the button on either earbud for 3 seconds.
The built-in microphone with ENC noise cancellation helps ensure clear communication during calls.

Image: Illustration detailing the one-button controls for music playback (play/pause, next/previous track) and call management (answer/end, reject call, voice assistant activation) on the Q28S earbuds.

Image: Diagram highlighting the 4-microphone system on each Q28S earbud, with feedforward microphones collecting environmental noise and call microphones collecting the user's voice for high-definition calls.
6. Wearing the Earbuds
The hadbleng Q28S earbuds are designed for a secure and comfortable fit, especially during physical activity. Choose the correct size of ear caps (S/M/L) for optimal comfort and sound quality. Gently place the earbud into your ear canal and adjust the flexible ear hook over your ear until it feels secure.

Image: Visual representation of the ergonomic design of the Q28S earbuds, featuring an ergonomically designed earbud, flexible ear hooks, and three sizes of eartips (S, M, L) for a secure and comfortable fit during workouts.
7. Maintenance
The earbuds have an IPX7 waterproof rating, meaning they can withstand sweat, splashes, and rain. However, they are not suitable for swimming or submersion in water. After intense workouts or exposure to moisture, wipe the earbuds and charging case with a dry, soft cloth. Avoid using harsh chemicals or abrasive materials for cleaning.
8. Troubleshooting
| Problem | Solution |
|---|---|
| Earbuds not pairing with device. |
|
| No sound from one or both earbuds. |
|
| Charging case not charging. |
|
| Earbuds fall out easily. |
|
9. Specifications
| Feature | Detail |
|---|---|
| Model Name | Q28S |
| Bluetooth Version | 5.3 |
| Speaker Size | 13.44mm |
| Bass Response | Down to 16Hz |
| Treble Range | Up to 20kHz |
| Charging Case Capacity | 800mAh |
| Total Playtime (with case) | Up to 60 hours |
| Earbud Battery Life | 6 hours |
| Charging Time | Approx. 2 hours (for full charge) |
| Water Resistance | IPX7 Waterproof |
| Connectivity Range | Up to 30 feet |
| Microphone | Built-in with ENC Noise Cancellation |
| Charging Port | Type-C |
| Material | Silicone (ear hooks, eartips) |
| Item Weight | 50 Milligrams (total) |
| UPC | 653628719672 |
10. Warranty and Support
Your purchase of the hadbleng Q28S Wireless Bluetooth Earbuds includes an extended 30-day hassle-free refund and a 24-month warranty. Customer satisfaction is our top priority. If you have any questions, concerns, or require assistance, please do not hesitate to contact our 24-hour online customer care service.
For support, please refer to the contact information provided with your product packaging or visit the official hadbleng store on Amazon.