Introduction
The ACEFAST AceFit Pro Open-Ear Headphones are designed to provide a superior audio experience with enhanced safety features and ultimate comfort. This manual will guide you through the setup, operation, and maintenance of your new headphones.

Figure 1: ACEFAST AceFit Pro Open-Ear Headphones in their transparent charging case.
What's in the Box
- Acefit Pro Open-ear Earbuds x2
- Acefit Pro Charging Case x1
- USB-C Charging Cable x1
- User Manual

Figure 2: All items included in the AceFit Pro packaging.
Setup
Initial Pairing
- Ensure the earbuds are in the charging case and the case is open.
- On your device (smartphone, tablet, laptop), enable Bluetooth.
- Search for available devices and select "ACEFAST ACEFIT Pro" to pair.
- Confirm pairing on your device if prompted.
Multi-Device Pairing
The AceFit Pro supports multi-point connectivity, allowing connection to two devices simultaneously (e.g., a smartphone and a laptop). Switch between devices seamlessly without re-pairing.

Figure 3: Seamless multi-device pairing for effortless multitasking.
Video 1: Instructions on connecting AceFit Pro to PC/tablet, especially if a PIN code is prompted.
Operating Instructions
Touch Controls
The earbuds feature intuitive touch controls for various functions:
- Single Tap: Volume up/down
- Double Tap: Play/Pause, Answer/Hang up calls
- Triple Tap: Previous/Next song
- Long Touch (2s): Reject call, Wake up voice assistant

Figure 4: Easy to use touch operation for various functions.
Video 2: Demonstration of ACEFAST Pro Gesture Control.
ACEFAST App Control
Download the ACEFAST app from your device's app store (Android Store or App Store) to unlock exclusive modes and customize settings:
- Monitor battery life of earbuds and charging case.
- Choose from various sound modes (Original Sound, Human Voice, Live, Bass).
- Customize EQ settings with an 8-band equalizer.
- Tailor earphone controls to your preference.
- Control and customize the 8 lighting effects of the earbuds and case.

Figure 5: App interface showing sound effects, battery life, and other features.

Figure 6: Connect to the ACEFAST APP to control exclusive modes and customize settings.
Product Features & Details
Night Safety Mode
Equipped with 40 high-brightness 3D floating LED lights, the AceFit Pro ensures you are visible from over 10 meters away, significantly enhancing safety during nighttime workouts, running, or cycling.

Figure 7: Earbuds with glowing LEDs for enhanced night safety.

Figure 8: Your go-to gear for night runs and rides, ensuring visibility.
Video 3: Demonstrates increased visibility with AceFit Pro during night activities.
Redefining Open-Ear Audio
Engineered by Luxshare-ICT, the 3-magnet super-linear speaker with up to 0.5mm high amplitude and cutting-edge diaphragm technology delivers powerful, deep bass, crystal-clear highs, and a rich, immersive sound experience.

Figure 9: The 3-magnet ultra-linear speaker redefines open-ear audio.
Video 4: Comparison of AceFit Pro's 3-magnet super-linear speaker vs. normal speaker.
Ultra-Comfort All-Day Wear
Weighing just 7.8g per earbud, the AceFit Pro is coated with ultra-soft supramolecular liquid silicone for a gentle, secure fit. The ultra-thin 0.7mm nickel-titanium memory wire ear hooks adapt perfectly to any ear shape, even for glasses wearers, redefining minimalist comfort.

Figure 10: Engineered for comfort, even for glasses wearers.

Figure 11: 7.6g Featherlight, All-day Comfort.
LED Display Charging Case
The transparent charging case, crafted with a premium 7-layer process, is ultra-slim at just 1.08 inches. Its built-in LED display keeps you instantly updated on battery life and charging status, blending style with convenience.

Figure 12: LED Display Charging Case showing battery levels.
Battery Life & Charging
Enjoy an impressive 30-hour battery life with the charging case. A quick 5-minute charge provides 2 hours of playtime.

Figure 13: 30 Hours Battery Life & 5 min Quick Charge.
IP54 Water Resistance
The earbuds are IP54 water resistant, allowing you to enjoy your music even when sweating heavily or caught in a downpour.

Figure 14: IP54 Water-Resistant for active lifestyles.
Specifications
| Feature | Description |
|---|---|
| Model Name | AceFit Pro |
| Connectivity Technology | Wireless (Bluetooth 5.4) |
| Battery Life | 30 Hours (with charging case) |
| Water Resistance | IP54 Water Resistant |
| Control Type | App Control, Touch |
| Ear Placement | Open Ear |
| Earbud Weight | 7.8g per earbud |
| Audio Driver | 3-magnet Super-linear Speaker (20mm) |
| Noise Cancellation | 4-mic ENC (for calls) |
Maintenance
To ensure the longevity and optimal performance of your AceFit Pro headphones, follow these maintenance tips:
- Regularly wipe the earbuds and charging case with a soft, dry cloth.
- Avoid exposing the device to extreme temperatures or direct sunlight for prolonged periods.
- Do not use abrasive cleaners or solvents.
- Ensure the charging port is clean and free of debris before charging.
Troubleshooting
If you encounter any issues with your AceFit Pro headphones, try the following:
- No Sound: Ensure earbuds are charged and properly paired. Check device volume.
- Pairing Issues: Turn off and on Bluetooth on your device. Place earbuds back in case, close, then reopen to reset pairing mode.
- Distorted Audio: Ensure earbuds are within Bluetooth range. Check for interference from other devices.
- LEDs Not Working: Check settings in the ACEFAST app to ensure lighting effects are enabled.
- Charging Case Display: Ensure the case is charged. The display shows battery percentage for the case and individual earbuds.
For further assistance, please refer to the official ACEFAST support channels.
Warranty and Support
For warranty information, technical support, or service inquiries, please visit the official ACEFAST website or contact their customer service. Keep your proof of purchase for warranty claims.
Visit the ACEFAST Store for more products and support resources.


