Introduction
Welcome to the Fidiso GLS-8-Bk Open Ear Headphones instruction manual. This guide provides essential information for setting up, operating, and maintaining your new headphones. Please read it carefully to ensure optimal performance and longevity of your device.
Package Contents
- Fidiso Open Ear Headphones (2 PCS)
- Wireless Charging Case
- Type-C Charging Cable
- Portable Lanyard
- User Manual

Image: All items included in the product package: the charging case, packing box, user manual, two earphones, a Type-C charging cable, and a portable lanyard.
Setup
1. Charging the Headphones and Case
Before first use, fully charge the headphones and charging case. Connect the provided Type-C cable to the charging case and a suitable USB power source. The LED display on the charging case will indicate the current battery level (1%-100%). A full charge for the case takes approximately 1.5 hours, providing up to 32 hours of additional battery life for the earbuds. The earbuds charge automatically when placed inside the case. A quick 10-minute charge provides approximately 2 hours of playback.

Image: Close-up of the charging case displaying the LED battery indicator and the Type-C charging port, illustrating charging functionality.
2. Wearing the Headphones
The Fidiso GLS-8-Bk headphones are designed for an open-ear, comfortable fit. Ensure the protective sticker on the back of the earbuds is removed before use.
- Take out the earbuds from the charging case.
- Place the earbud over your ear, ensuring the earhook sits comfortably behind your ear.
- Rotate the earbud backward along the ear to achieve a snug and stable fit.
- Adjust as needed for comfort.

Image: Visual instructions detailing the four steps to correctly wear the earbuds: take out, place above ear, rotate backward, and complete insertion.
3. Pairing with Your Device
The headphones utilize Bluetooth 5.4 technology for stable and efficient connections.
- Open the charging case. The earbuds will automatically power on and enter pairing mode.
- On your smartphone, tablet, or other Bluetooth-enabled device, navigate to the Bluetooth settings.
- Search for 'GLS-8' in the list of available devices and select it to connect.
- Once successfully paired, the earbuds will automatically connect to your device when removed from the case for future use.

Image: A smartphone screen indicating successful Bluetooth connection to the GLS-8 headphones, illustrating the simple pairing process.

Image: An illustration of the Bluetooth 5.4 technology chip, emphasizing stable connections, lower power consumption, and wide compatibility with iOS, Android, and Windows devices.
Operating Instructions
Touch Controls
The Fidiso GLS-8-Bk headphones feature intuitive touch controls on each earbud for managing audio playback and calls.
| Function | Action |
|---|---|
| Play/Pause | Single tap (x1) on either earbud |
| Activate Voice Assistant (Siri) | Press and hold (x5s) on either earbud |
| Next Song | Triple tap (x3) on the right earbud |
| Previous Song | Triple tap (x3) on the left earbud |
| Answer/End Call | Double tap (x2) on either earbud |
| Hang Up Call | Press and hold (x2s) on either earbud during a call |
| Volume Up | Single tap (x1) on the right earbud |
| Volume Down | Single tap (x1) on the left earbud |

Image: An illustration showing the earbud and charging case, pointing out the LED battery display, charging contacts, touch control area, and HD microphone, along with a legend for various touch functions.
Sound Features
The Fidiso GLS-8-Bk headphones are engineered for a high-quality audio experience:
- 16mm Dynamic Driver: Equipped with a 16mm dynamic driver for balanced and clear audio reproduction, delivering richer and more realistic sound.
- 360° ACS Panoramic Sound: Provides an immersive listening experience that recreates the natural acoustics of a live music scene.
- Directional Sound Transmission: Adjusts sound propagation within a ±25° range based on wearing posture, reducing sound leakage by up to 95% while keeping you aware of your surroundings.
- Dual-Mic Noise Cancellation: Ensures crystal-clear call quality, even in noisy environments.

Image: An exploded view diagram highlighting the 16mm dynamic driver responsible for the headphones' rich, clear, and realistic audio.
Maintenance
Cleaning
Gently wipe the earbuds and charging case with a soft, dry, lint-free cloth. Avoid using harsh chemicals, abrasive materials, or liquids directly on the device, as this may cause damage.
Water Resistance
The Fidiso GLS-8-Bk earbuds are rated IPX5 waterproof, providing protection against sweat and light splashes. This makes them suitable for workouts and outdoor activities. Do not submerge the earbuds or charging case in water, and avoid exposure to heavy rain or extreme moisture.

Image: A woman engaged in sports, showcasing the IPX5 waterproof rating of the Fidiso GLS-8-Bk headphones, suitable for workouts.
Storage
When not in use, store the headphones in their charging case to protect them from dust and damage, and to ensure they remain charged for your next use. Store in a cool, dry place away from direct sunlight and extreme temperatures.
Troubleshooting
If you encounter any issues with your Fidiso GLS-8-Bk headphones, please refer to the following common solutions:
- No Sound or Connection Issues:
- Ensure both earbuds are charged and removed from the charging case.
- Verify that Bluetooth is enabled on your device and 'GLS-8' is selected in the Bluetooth settings.
- Try turning Bluetooth off and then on again on your device.
- Place the earbuds back into the charging case, close the lid, wait a few seconds, and then reopen to reset the connection.
- Charging Problems:
- Check that the Type-C charging cable is securely connected to both the charging case and the power source.
- Ensure the charging contacts on the earbuds and inside the case are clean and free of any debris.
- Try using a different charging cable or power adapter.
- Uncomfortable Fit:
- Adjust the earhook position until a comfortable and secure fit is achieved. The open-ear design is intended to sit outside the ear canal, not inside.
Specifications
Key technical specifications for the Fidiso GLS-8-Bk Open Ear Headphones:
| Feature | Detail |
|---|---|
| Brand | Fidiso |
| Model Number | GLS-8-Bk |
| Ear Placement | Open Ear |
| Connectivity Technology | Wireless (Bluetooth) |
| Bluetooth Version | 5.4 |
| Bluetooth Range | 33 Feet (10 meters) |
| Audio Driver Size | 16 mm Dynamic Driver |
| Impedance | 32 Ohms |
| Frequency Response | 20 Hz - 20,000 Hz |
| Earbud Battery Life | 6-8 Hours (single charge) |
| Total Playback Time (with case) | Up to 40 Hours |
| Charging Case Battery Capacity | 300 mAh |
| Earbud Charging Time | Approx. 1.5 Hours |
| Charging Case Charging Time | Approx. 1.5 Hours |
| Water Resistance Level | IPX5 |
| Control Type | Touch Control |
| Noise Control | Dual-Mic Noise Cancellation |
| Compatible Devices | iOS, Android, Windows (Cellphones, Desktops, Laptops, Smart Watch) |
Warranty and Support
Warranty Information
The Fidiso GLS-8-Bk Open Ear Headphones come with a 1-year warranty from the date of purchase. This warranty covers manufacturing defects and ensures your product functions as intended under normal use. Please retain your proof of purchase for warranty claims.
Customer Support
For any questions, technical assistance, or warranty inquiries, please contact Fidiso customer service. You can typically find contact information through the platform where you purchased the product or by visiting the official Fidiso website. Please provide your model number (GLS-8-Bk) and a detailed description of the issue when contacting support.