1. Introduction
Welcome to the user manual for your new cellularline Sprinter Wireless Earbuds. These earbuds are designed for active lifestyles, offering extended battery life, comfortable fit, and water resistance. This manual provides essential information on how to set up, operate, and maintain your earbuds to ensure optimal performance and longevity.
2. Package Contents
Please check the box for the following items:
- cellularline Sprinter Wireless Earbuds (Left and Right)
- Charging Case
- MicroUSB-C Charging Cable
- User Manual (this document)
3. Product Overview
Familiarize yourself with the components of your cellularline Sprinter Wireless Earbuds.

Figure 3.1: The cellularline Sprinter wireless earbuds, featuring a vibrant yellow body with grey ear hooks and ear tips. Each earbud has volume and control buttons on the side.

Figure 3.2: The open charging case with the cellularline Sprinter earbuds securely placed inside. Three blue LED indicators on the front of the case show the charging status.

Figure 3.3: The cellularline Sprinter charging case in its closed state, displaying a sleek black, compact design with the brand logo subtly embossed on the lid. Three blue LED indicators are visible on the front.

Figure 3.4: A close-up view of the cellularline Sprinter charging case, highlighting the USB-C charging port located at the bottom. This port is used to recharge the case and earbuds.
4. Setup
4.1 Initial Charge
Before first use, fully charge your earbuds and charging case.
- Place both earbuds into the charging case.
- Connect the MicroUSB-C charging cable to the port on the charging case and plug the other end into a USB power source (e.g., wall adapter, computer USB port).
- The LED indicators on the case will illuminate to show charging status. A full charge takes approximately 1.5 hours for the case and 2 hours for the earbuds.
4.2 Pairing with a Device
To connect your earbuds to your smartphone or other Bluetooth-enabled device:
- Ensure the earbuds are charged and placed in the charging case.
- Open the charging case lid. The earbuds will automatically enter pairing mode.
- On your device, go to Bluetooth settings and turn Bluetooth on.
- Select "Sprinter" from the list of available devices.
- Once connected, you will hear a confirmation tone, and the earbuds will be ready for use.
5. Operating Instructions
5.1 Power On/Off
- Power On: Open the charging case lid, or press and hold the multi-function button on each earbud for 3 seconds.
- Power Off: Place the earbuds back into the charging case and close the lid, or press and hold the multi-function button on each earbud for 5 seconds.
5.2 Music Playback
- Play/Pause: Single tap the multi-function button on either earbud.
- Next Track: Double tap the multi-function button on the right earbud.
- Previous Track: Double tap the multi-function button on the left earbud.
- Volume Up: Triple tap the multi-function button on the right earbud.
- Volume Down: Triple tap the multi-function button on the left earbud.
5.3 Call Management
- Answer/End Call: Single tap the multi-function button on either earbud.
- Reject Call: Press and hold the multi-function button on either earbud for 2 seconds.
6. Maintenance
To ensure the longevity and optimal performance of your cellularline Sprinter Wireless Earbuds, follow these maintenance guidelines:
- Cleaning: Regularly clean the earbuds 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 earbuds in their charging case to protect them from dust and damage.
- Water Resistance: The earbuds are IPX5 certified, protecting them from rain and sweat. However, they are not designed for submersion in water. Avoid exposing them to excessive moisture.
- Charging: Always use the provided MicroUSB-C cable for charging. Avoid using damaged cables or chargers.
7. Troubleshooting
If you encounter any issues with your earbuds, refer to the table below for common problems and solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Earbuds do not power on. | Low battery. | Charge the earbuds and charging case fully. |
| Earbuds do not pair with device. | Bluetooth is off on device; earbuds not in pairing mode; previously paired with another device. | Ensure Bluetooth is on. Place earbuds in case, open lid to enter pairing mode. Forget "Sprinter" from device's Bluetooth list and re-pair. |
| No sound or low volume. | Volume too low; earbuds not properly seated; connection issue. | Adjust volume on both earbuds and device. Ensure earbuds are properly seated in ears. Reconnect earbuds to device. |
| One earbud has no sound. | Earbud not connected; low battery on one earbud. | Place both earbuds in the charging case, close the lid, then open again. Ensure both earbuds are charged. |
8. Specifications
Detailed technical specifications for the cellularline Sprinter Wireless Earbuds:
| Feature | Specification |
|---|---|
| Model Name | BTSPRINTERTWSK |
| Bluetooth Version | V 5.0 |
| Supported Profiles | Headset, Handsfree, A2DP, AVRCP |
| Operating Range | 10 meters |
| Earbud Battery Capacity | 70 mAh x 2 |
| Charging Case Battery Capacity | 500 mAh / 1.1 Wh |
| Play Time | Up to 30 hours (with charging case) |
| Talk Time | 9 hours |
| Standby Time | 90 hours |
| Earbud Charge Time | Approx. 2 hours |
| Case Charge Time | Approx. 1.5 hours |
| Charging Port | MicroUSB-C |
| Water Resistance | IPX5 (Sweat and splash resistant) |
| Weight | 40 Grams |
| Material | Plastic |
9. Warranty and Support
Your cellularline Sprinter Wireless Earbuds come with a 2-year manufacturer's warranty. This warranty covers defects in materials and workmanship under normal use.
For warranty claims, technical support, or any questions not covered in this manual, please contact cellularline customer service through their official website or the retailer where you purchased the product. Please retain your proof of purchase for warranty validation.
For more information, visit the official cellularline website: www.cellularline.com





