Introduction
The Cellularline Hark earbuds offer a True Wireless Stereo experience with an ergonomic and sleek design. These lightweight and comfortable earbuds allow you to enjoy music and manage calls without the hassle of wires, providing complete freedom. Featuring touch controls, you can easily manage music tracks and incoming calls. The modern charging case provides up to 3 full recharges for the earbuds, offering a total playtime of 16 hours.
What's in the Box
- Cellularline Hark True Wireless Earbuds
- Charging Case
- USB Charging Cable (Type-C)
Setup
1. Charging the Earbuds and Case
Before first use, fully charge the earbuds and the charging case. The charging case provides up to 3 full recharges for the earbuds, extending total playtime to 16 hours.
- Place the earbuds into the charging case. Ensure they are correctly seated in their respective slots.
- Connect the provided USB Type-C charging cable to the charging port on the case and to a suitable USB power source.
- The indicator lights on the case will show the charging status. Once fully charged, the lights will indicate completion or turn off. Charging typically takes approximately 2 hours.

Image: Cellularline Hark earbuds placed inside their open charging case, ready for charging. The charging contacts are visible.
2. Pairing with a Device (Bluetooth 5.0)
The Hark earbuds utilize Bluetooth 5.0 for a stable and efficient connection.
- Ensure the earbuds are charged.
- Open the charging case. The earbuds will automatically enter pairing mode, indicated by flashing lights (refer to the product's specific LED indicator guide if available).
- On your smartphone, tablet, or other Bluetooth-enabled device, go to the Bluetooth settings.
- Search for available devices. You should see "HARK" or "Cellularline Hark" in the list.
- Select the earbuds to connect. Once connected, a voice prompt or steady light on the earbuds will confirm successful pairing.
- For subsequent use, the earbuds will automatically connect to the last paired device when removed from the case.

Image: A pair of Cellularline Hark earbuds, one shown from the side with its in-ear tip, and the other from the front revealing its charging contacts. The open charging case is also visible.
Operating the Earbuds
Touch Controls
The Hark earbuds feature intuitive touch controls for managing audio playback and calls. The touch sensitive area is located on the outer surface of each earbud.
| Action | Function |
|---|---|
| Single Tap (Left/Right Earbud) | Play/Pause music, Answer/End call |
| Double Tap (Right Earbud) | Next track |
| Double Tap (Left Earbud) | Previous track |
| Triple Tap (Right Earbud) | Increase volume |
| Triple Tap (Left Earbud) | Decrease volume |
| Long Press (Left/Right Earbud) | Activate voice assistant, Reject call |
Note: Specific touch control functions may vary slightly depending on your connected device and operating system.
Double Master Function
The Double Master Function allows you to use either the left or right earbud independently. Simply take one earbud out of the case, and it will automatically connect to your device. You can answer calls or listen to music using just one earbud.

Image: A man wearing a Cellularline Hark earbud, demonstrating comfortable use during daily activities.
Maintenance
Proper maintenance ensures the longevity and optimal performance of your Cellularline Hark earbuds.
- Cleaning: Regularly clean the earbuds, especially the ear tips and charging contacts, with a soft, dry, lint-free cloth. Do not use abrasive materials or harsh chemicals.
- Storage: When not in use, always store the earbuds in their charging case to protect them from dust, damage, and to keep them charged.
- Water Resistance: The earbuds are resistant to water. However, they are not waterproof. Avoid submerging them in water or exposing them to heavy rain. Dry them thoroughly if they get wet.
- Temperature: Avoid exposing the earbuds and charging case to extreme temperatures (hot or cold) or direct sunlight for extended periods.
Troubleshooting
If you encounter issues with your Cellularline Hark earbuds, refer to the following common solutions:
| Problem | Solution |
|---|---|
| Earbuds not pairing |
|
| Only one earbud working |
|
| Poor sound quality or disconnections |
|
| Earbuds not charging |
|
Specifications
| Feature | Detail |
|---|---|
| Model Name | BTHARKTWSW |
| Brand | Cellularline |
| Connectivity Technology | Wireless (Bluetooth) |
| Bluetooth Version | 5.0 |
| Ear Placement | In-ear |
| Noise Control | Sound Isolation |
| Control Type | Touch Control |
| Charging Port | USB Type-C |
| Total Playtime (with case) | Up to 16 hours |
| Charging Time | Approximately 2 hours |
| Wireless Range | Up to 10 meters |
| Weight | 40 Grams (total) |
| Material | Plastic |
| Water Resistance Level | Water Resistant |
Warranty and Support
For warranty information and customer support, please refer to the official Cellularline website or contact their customer service directly. Keep your proof of purchase for any warranty claims.
You can visit the Cellularline store for more information: Cellularline Store

