1. Introduction
The ACEFAST FA002 ACEFIT Air are innovative wireless open-ear earphones designed for comfort and impressive sound quality. Featuring Bluetooth 5.4 for ultra-fast connection, these earbuds offer a lightweight and thin design, directional sound technology to minimize leakage, and ENC call noise reduction for clear communication. They are also IP54 rated for dust and water resistance, making them suitable for various activities.
Figure 1: ACEFAST ACEFIT Air Earphones and Charging Case
Video 1: Overview of ACEFAST ACEFIT Air features including ergonomic design, directional audio, IP54 rating, Bluetooth 5.4, and dual device connectivity.
2. Package Contents
Please check the box for the following items:
- Packing box x1
- Earbuds x1 pair
- USB-C charging cable x1
- User Manual x1
Figure 2: Visual representation of the package contents.
3. Specifications
| Feature | Specification |
|---|---|
| Bluetooth Version | 5.4 |
| Charging Case Battery Capacity | 500mAh |
| Earbud Battery Capacity | 60mAh (each) |
| Music Playback Time | Up to 6 hours (earbuds), up to 25 hours (with charging case) |
| Call Time | Up to 5 hours |
| Quick Charge | 10 minutes charge for 2 hours music playback |
| Material | ABS, Plastic, Silica Gel |
| Waterproof Rating | IP54 |
| Maximum Wireless Range | <10m |
| Number of Drivers | 2 |
| Driver Diameter | 20mm |
| Impedance Range | Up to 32 Ω |
| Frequency Response Range | 50 - 20000 Hz |
| Sensitivity | 90 dB |
| Resistance | 32 Ω |
| Working Frequency Range | 2402-2483.5MHz |
| Earphone Dimensions | 49 x 29 x 20mm |
| Charging Case Dimensions | 78.9 x 62.6 x 24.0mm |
| Charging Method | USB Type-C |
| Features | Microphone, Wireless, App Support, ENC Call Noise Reduction, Directional Sound |
4. Setup
4.1 Charging the Earphones and Case
Before first use, fully charge the earphones and charging case. Connect the provided USB-C charging cable to the charging port on the case and a power source. The charging case has a 500mAh battery, and each earbud has a 60mAh battery. A quick 10-minute charge can provide up to 2 hours of music playback.
Figure 3: Earbuds being placed into the charging case for charging.
4.2 Pairing with a Device
- Open the charging case. The earbuds will automatically enter pairing mode.
- On your device (smartphone, tablet, laptop), enable Bluetooth.
- Search for "ACEFIT Air" in the list of available Bluetooth devices.
- Select "ACEFIT Air" to connect. Once connected, you will hear an audio prompt.
The ACEFIT Air features upgraded Bluetooth 5.4 for an ultra-fast and stable connection.
4.3 Connecting to the ACEFAST App
For enhanced control and customization, download the official ACEFAST app from the Android Store or Apple App Store. The app allows you to switch between various sound effects, customize touch operations, and tailor your music style with custom EQ settings.
Figure 4: The ACEFAST app interface for controlling earbud settings and custom EQ.
5. Operating Instructions
5.1 Wearing the Earphones
The ACEFIT Air earphones feature an open-ear design with high-comfort ear hooks. Gently place the ear hooks over your ears, ensuring the sound units are positioned comfortably near your ear canal without entering it. This design allows for awareness of your surroundings while enjoying audio.
Figure 5: Proper wearing of the open-ear earphones for directional sound.
5.2 Touch Controls
The earphones are equipped with touch-sensitive controls on each earbud. Refer to the diagram below for specific functions:
Figure 6: Detailed touch control functions for both left and right earbuds.
| Action | Left Earbud Function | Right Earbud Function |
|---|---|---|
| Tap | Turn down volume | Turn up volume |
| Double Tap | Answer/Hang up call | Answer/Hang up call |
| Three Taps | Previous song | Next song |
| Long Touch 2s | Wake up voice assistant | Wake up voice assistant |
| Long Touch 3s | Independent boot | Independent boot |
| Long Touch 3-5s | Restore factory settings | Restore factory settings |
5.3 Dual Device Connectivity
The ACEFIT Air supports seamless switching between two connected devices simultaneously. For example, you can be watching a video on a tablet and instantly answer a call on your mobile phone using the earbuds without needing to manually switch connections.
Figure 7: Illustrates simultaneous connection to a phone and a tablet.
6. Maintenance
6.1 Cleaning
Regularly clean your earphones and charging case to ensure optimal performance and hygiene. Use a soft, dry, lint-free cloth to wipe down the surfaces. For stubborn dirt, a slightly damp cloth can be used, but ensure no moisture enters any openings. Do not use harsh chemicals or abrasive materials.
6.2 Storage
When not in use, store the earphones in their charging case to protect them from dust, damage, and to keep them charged. Store the case in a cool, dry place away from extreme temperatures.
7. Troubleshooting
7.1 No Sound or Connection Issues
- Ensure the earbuds are charged.
- Verify Bluetooth is enabled on your device and the earbuds are paired.
- Try unpairing and re-pairing the earbuds with your device.
- If connecting to multiple devices, ensure the correct device is actively selected or try disconnecting from other devices.
- Move closer to your device to ensure you are within the <10m wireless range.
7.2 Sound Leakage
The ACEFIT Air uses AudioLance Directional Audio Technology and directional sound focusing technology to reduce sound leakage by up to 90%. If you experience significant sound leakage, ensure the earbuds are positioned correctly on your ears as shown in Figure 5.
7.3 Call Quality Issues
The earphones feature ENC (Environmental Noise Cancellation) technology for calls. If call quality is poor, ensure the microphones are not obstructed and you are in an area with good network coverage.
8. User Tips
- Water Resistance: The earphones have an IP54 rating, meaning they are protected against dust and splashing water from any direction. They are suitable for workouts and light rain, but not recommended for swimming or submersion in water.
- Charging: The charging case does not support wireless charging. Please use the provided USB-C cable for charging.
- Comfort: The open-ear design is intended for comfort during long wear and to maintain environmental awareness. Adjust the ear hooks for the most secure and comfortable fit.
9. Safety Information
- Do not disassemble, repair, or modify the product.
- Keep the product away from extreme temperatures, direct sunlight, and fire.
- Avoid exposing the product to strong magnetic fields.
- Do not use the product during thunderstorms to prevent malfunction or electric shock.
- Keep out of reach of children and pets.
- Dispose of the product and batteries responsibly according to local regulations.
10. Warranty and Support
For warranty information, technical support, or customer service inquiries, please refer to the official ACEFAST website or contact your local retailer. Ensure you have your product model number (FA002 ACEFIT Air) and proof of purchase available when seeking support.
