1. Introdución
The ACEFAST ACEFIT NEO Open-Ear Earphones are designed to provide a natural and comfortable listening experience. Utilizing air conduction technology, these earphones allow you to enjoy high-quality audio while remaining aware of your surroundings. This manual provides detailed instructions on how to set up, operate, and maintain your earphones.

Figure 1: ACEFAST ACEFIT NEO Earphones and Charging Case
The image displays the ACEFAST ACEFIT NEO open-ear earphones, showing both individual earbuds and their transparent charging case. The design emphasizes their non-in-ear fit and compact form factor.
2. Contido do paquete
Marque a caixa para os seguintes elementos:
- ACEFAST ACEFIT NEO Earphones (2 units)
- Estuche de carga (1 unidade)
- Manual de instrucións (1 unidade)
- S/M/L Eartips (3 pairs, M size pre-installed)
- 0.2m USB-A to USB-C Cable (1 unit)

Figura 2: Accesorios incluídos
This image shows the complete package contents, including the earphones, charging case, various sized ear tips, a USB-C charging cable, and the instruction manual, laid out neatly.
3. Configuración
3.1 Carga dos auriculares e da funda
Before first use, fully charge the earphones and charging case. The charging case supports both USB-C fast charging and wireless charging.
- Carga USB-C: Connect the provided USB-A to USB-C cable to the charging port on the case and a power source.
- Carga sen fíos: Coloca a caixa de carga nunha base de carga sen fíos compatible.
A full charge of the earphones provides up to 8.5 hours of music playback. With the charging case, total playback time extends to approximately 30 hours. A quick 10-minute charge can provide about 2 hours of music playback.

Figure 3: Charging the Earphones
This image illustrates the charging process, showing the earphones inside the charging case, with the case placed on a wireless charging pad, indicating its wireless charging capability.
3.2 Emparejamento Bluetooth
Para conectar os auriculares a un dispositivo:
- Asegúrate de que os auriculares estean cargados e dentro da caixa de carga.
- Abre a caixa de carga. Os auriculares entrarán automaticamente no modo de emparellamento.
- No teu dispositivo (teléfono intelixente, tableta, etc.), activa o Bluetooth.
- Busca "ACEFIT NEO" in the list of available Bluetooth devices.
- Select "ACEFIT NEO" to connect. Once connected, you will hear a confirmation tone.
The earphones feature advanced Bluetooth 5.3 technology for stable connection and enhanced audio clarity.
4. Instrucións de uso
The ACEFIT NEO earphones are designed for a comfortable and secure open-ear fit. Follow these steps for optimal wearing:
- Prepare the Earphone: Hold the earphone with the ear tip facing towards your ear canal.
- Posición na orella: Gently place the earphone into your ear, ensuring the main body rests comfortably in the concha (outer ear bowl).
- Adjust Ear Hook: Adjust the silicone ear hook to fit securely around your ear's antihelix. The patented silicone ear hooks provide a stable fit without blocking the ear canal.
- Axuste final: Ensure the earphone is vertical and aligned for the best sound and comfort.
This innovative design ensures zero contact with the ear canal, promoting air circulation and reducing discomfort from prolonged wear, even with glasses or masks.

Figure 4: Earphone Wearing Method
This diagram illustrates the four steps for correctly wearing the ACEFIT NEO earphones, highlighting the placement of the earphone body and the adjustment of the ear hook for a secure fit.
5. Instrucións de funcionamento
5.1 Controis táctiles
The ACEFIT NEO earphones feature an ultra-large touch area for easy control of various functions:
| Acción | Función |
|---|---|
| Single tap (Right earbud) | Subir volume |
| Single tap (Left earbud) | Baixar o volume |
| Double tap (Either earbud) | Reproducir/Pausar música, Responder/Finalizar chamada |
| Triple tap (Right earbud) | Próxima pista |
| Triple tap (Left earbud) | Pista anterior |
| Press and hold for 2 seconds (Either earbud) | Activa o asistente de voz |

Figure 5: Full Touch Control
This image shows a user interacting with the earphone, demonstrating the ease of using the touch controls for various functions like volume adjustment and call management.
5.2 Calidade e características do son
The ACEFIT NEO earphones are equipped with a 14.8mm large-diameter dynamic driver, delivering high-quality stereo sound with powerful bass. Integrated bass enhancement technology ensures a rich audio experience even at low volumes.
For clear communication, ENC (Environmental Noise Cancellation) call noise reduction technology is included. This system uses a microphone array to accurately pick up your voice while suppressing ambient noise, ensuring clear calls even in noisy environments. Note: This noise cancellation feature is different from ANC (Active Noise Cancelling) and is active only during calls.

Figure 6: High-Quality Stereo Sound
Esta imaxe ofrece un recorte view of the earphone's 14.8mm dynamic driver, illustrating its internal components. Alongside, a frequency response graph highlights the enhanced bass and clear sound profile.
5.3 Environmental Awareness (Open-Ear Design)
The open-ear design allows you to enjoy your music while remaining aware of your surroundings. This is crucial for safety during outdoor activities such as walking, cycling, or running, as you can hear important environmental sounds like traffic or warnings.

Figure 7: Awareness in Different Environments
This composite image shows individuals using the earphones in various real-world scenarios: interacting with others, walking safely in the city, and exercising outdoors, emphasizing the benefit of staying aware of surroundings.
6. Mantemento
To ensure the longevity and optimal performance of your ACEFIT NEO earphones, follow these maintenance guidelines:
- Limpeza: Regularly wipe the earphones and charging case with a soft, dry cloth. If the ear tips become dirty, they can be removed and cleaned separately with mild soap and water, then thoroughly dried before reattaching.
- Almacenamento: Cando non os uses, garda os auriculares na súa funda de carga para protexelos do po e dos danos.
- Resistencia á auga: The earphones have an IPX4 water resistance rating, meaning they are resistant to splashes and sweat. Avoid submerging them in water or exposing them to heavy rain.

Figure 8: Sweat Resistance
This image features a woman exercising while wearing the earphones, highlighting their open design and implying their suitability for activities where sweating might occur, without causing issues.
7 Solución de problemas
If you encounter any issues with your ACEFIT NEO earphones, please refer to the following common solutions:
- Sen son:
- Asegúrese de que os auriculares estean cargados.
- Check if the earphones are properly connected to your device via Bluetooth.
- Adjust the volume on both the earphones and your device.
- Non se pode emparellar:
- Asegúrate de que o Bluetooth estea activado no teu dispositivo.
- Place the earphones back into the charging case, close the lid, then open it again to re-enter pairing mode.
- Esquece o dispositivo da configuración de Bluetooth do teu teléfono e tenta emparellalo de novo.
- Earphones Keep Falling Out:
- Ensure you are using the correct size ear tips (S/M/L) for your ears.
- Adjust the ear hook for a more secure fit as described in the wearing instructions.
- Fuga de son:
- While the open-ear design allows some ambient sound, significant sound leakage to others can be minimized by adjusting the volume.
- Ensure the earphones are properly seated in your ear.
- Problemas de carga:
- Comproba o cable de carga e a fonte de alimentación.
- Ensure the charging case is properly placed on the wireless charging pad.
- Limpa os contactos de carga tanto dos auriculares como da funda.
Se o problema persiste despois de probar estes pasos, ponte en contacto co servizo de atención ao cliente.
8. Especificacións
| Característica | Especificación |
|---|---|
| Nome do modelo | FA003 |
| Tecnoloxía de conectividade | Sen fíos (Bluetooth 5.3) |
| Tamaño do controlador | 14.8 mm |
| Peso dos auriculares | 8 g (por auricular) |
| Continuous Playback (Earphones only) | Ata 8.5 horas |
| Total Playback (with Charging Case) | Ata 30 horas |
| Carga rápida | 10 min charge for approx. 2 hours playback |
| Porto de carga | USB tipo C |
| Carga sen fíos | Soportado |
| Resistencia á auga | IPX4 (a proba de salpicaduras) |
| Control de ruído | Cancelación de ruído ambiental (ENC) para chamadas |
| Material | Acrilonitrilo Butadieno Estireno (ABS) |
| Sensibilidade | 93 dB |
9. Garantía e soporte
ACEFAST provides a quality warranty for its products within 18 months of purchase. Your order number serves as your warranty card.
If you encounter any issues with your product or require assistance, please do not hesitate to contact our customer support. We are committed to providing prompt and helpful service.
For support, please visit the official ACEFAST store on Amazon or contact us directly through your purchase platform.





