Introduction
The A'Gold FN-B48 TWS Bluetooth 5.4 Gamer Earbuds are designed to provide an immersive audio experience with advanced features for gaming, music, and calls. This manual provides essential information on setting up, operating, and maintaining your earbuds to ensure optimal performance.

Figure 1: A'Gold FN-B48 Earbuds and accessories.
What's Included
- Two A'Gold FN-B48 Earbuds
- Charging Case with LED
- USB Charging Cable
- Two (2) Pairs of Extra Ear Tips
Product Overview
The A'Gold FN-B48 earbuds feature Bluetooth 5.4 for a stable and efficient wireless connection. They incorporate AI Noise Cancellation to minimize external interference, providing clearer audio for an immersive experience. An integrated microphone ensures clear communication during calls, gaming, or streaming. The ergonomic in-ear design offers lightweight comfort for extended use. The unique charging case features a robotic LED display, adding a distinctive gamer aesthetic. The product is ANATEL certified (10184-24-15069), ensuring quality and safety standards.

Figure 2: Immersive sound experience.
Setup
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 USB charging cable to the Type-C port on the case and to a power source. A full charge takes approximately 1.5 hours. The earbuds provide up to 8 hours of continuous playback, with an additional 12 hours of charge available from the case.

Figure 3: Earbuds in charging case.

Figure 4: Battery life indication.
2. Bluetooth Pairing
The earbuds utilize Bluetooth 5.4 for quick and stable pairing. Open the charging case, and the earbuds will automatically enter pairing mode. On your device (smartphone, tablet, console, or notebook), navigate to Bluetooth settings and select "FN-B48" from the list of available devices to connect.
Video 1: Demonstrates unboxing, semi-in-ear design, Bluetooth connection, and basic touch controls.

Figure 5: Bluetooth 5.4 connectivity.
Operating Instructions
Touch Controls
The FN-B48 earbuds feature intuitive touch controls for managing audio playback, calls, and voice assistants:
- Play/Pause: Double-tap either earbud.
- Next Track: Triple-tap the right earbud.
- Previous Track: Triple-tap the left earbud.
- Volume Up: Long-press the right earbud.
- Volume Down: Long-press the left earbud.
- Activate Voice Assistant (Siri): Long-press either earbud when music is paused.
- Answer/End Call: Single-tap either earbud.
- Reject Call: Long-press either earbud.
Video 2: Illustrates RGB ambient lighting, ergonomic design, quick Bluetooth 5.4 connection, and various touch controls including play/pause, volume adjustment, and track changes.
Gaming Mode
The FN-B48 earbuds support an ultra-low latency gaming mode, ensuring minimal audio delay for a synchronized gaming experience.

Figure 6: Gaming with A'Gold FN-B48 Earbuds.
Mono/Binaural Mode
The earbuds can be used individually (mono mode) or together (binaural mode). Simply remove one earbud from the case to use it independently. If you remove the second earbud, they will automatically connect for stereo sound.
Maintenance
To ensure the longevity and optimal performance of your A'Gold FN-B48 earbuds:
- Regularly clean the earbuds and charging case with a soft, dry cloth.
- Avoid exposing the earbuds to extreme temperatures, humidity, or liquids. While water-resistant, they are not waterproof.
- Store the earbuds in their charging case when not in use to protect them and keep them charged.
- Replace ear tips if they become worn or damaged to maintain comfort and sound quality.
Troubleshooting
If you encounter issues with your earbuds, try the following:
- No Sound: Ensure earbuds are charged, properly paired, and volume is adjusted on both the earbuds and your device.
- Pairing Issues: Turn off Bluetooth on your device, place earbuds back in the case, close and reopen the case, then try pairing again. Ensure no other devices are connected to the earbuds.
- One Earbud Not Working: Place both earbuds in the charging case, close the lid for a few seconds, then reopen. This often resets the connection between them.
- Charging Problems: Check the charging cable and power source. Ensure the charging contacts on the earbuds and case are clean and free of debris.
Specifications
| Feature | Specification |
|---|---|
| Model Name | TWS FN-B48 |
| Connectivity Technology | Bluetooth 5.4 |
| Wireless Communication Technology | Bluetooth |
| Noise Control | Active Noise Cancellation, Sound Isolation |
| Frequency Response | 20 KHz |
| Sensitivity | 32 dB |
| Impedance | 140 Ohm |
| Headphone Connector | Wireless |
| Components Included | Cable, Wireless Charging Case |
| Material | Acrylonitrile Butadiene Styrene (ABS), Plastic, Polycarbonate (PC) |
| Specific Uses | Physical Activities, Entertainment, Gaming |
| Charging Time | Approx. 1.5 hours |
| Average Battery Life | 8 Hours (earbuds) |
| Water Resistance Level | Water Resistant |
| Control Type | Touch Control, Volume Control |
| Maximum Operating Distance | 10 Meters |
| ANATEL Certification | 10184-24-15069 |
Warranty and Support
This product comes with a 7-day warranty directly from the manufacturer. For any support or warranty claims, please contact the seller or manufacturer within this period.