Introduction
Thank you for choosing the AOC ACT3521 Wireless Earphones. These earphones are designed to provide a high-quality audio experience with features such as HiFi stereo sound, low latency for gaming, and an IPX5 waterproof rating, making them suitable for various activities including sports. This manual provides essential information for setting up, operating, maintaining, and troubleshooting your device.
What's in the Box
Please check the package contents to ensure all items are present:
- AOC ACT3521 Wireless Earphones
- Wireless Charging Case
- USB Charging Cable
- User Manual
Setup
1. Charging the Earphones and Case
Before first use, fully charge the earphones and the charging case. The charging case features a digital LED display to show the battery status.
Image: The earphones in their charging case, illustrating battery life and charging duration. A full charge provides approximately 7.5 hours of playback, with the charging case extending total usage to 40 hours. The case supports fast charging, reaching full capacity in 1.5 hours via a Type-C port.
Image: The charging case with a digital LED display indicating the remaining battery percentage for the case and individual earbud charge levels (L/R).
- Connect the charging cable to the Type-C port on the charging case and a power source.
- The LED display on the case will show the charging progress.
- A full charge for the case takes approximately 1 hour.
- The earphones will charge automatically when placed inside the powered case.
2. Bluetooth Pairing
The AOC ACT3521 earphones feature Bluetooth 5.4 for fast and stable connections.
Image: A smartphone screen showing the Bluetooth settings with "AOC ACT3521" available for connection, demonstrating the instant pairing process.
- Open the charging case and remove both earphones. They will automatically enter pairing mode.
- On your device (smartphone, tablet, computer), go to the Bluetooth settings.
- Search for available devices and select "AOC ACT3521" from the list.
- Once connected, you will hear a confirmation tone, and the earphones will be ready for use.
Image: A diagram highlighting the Bluetooth 5.4 chip, emphasizing faster and more stable connections, lower power consumption, a transmission distance of 10 meters, and 99% device compatibility.
Operating Instructions
Touch Controls
The AOC ACT3521 earphones feature intuitive touch controls on each earbud for managing audio playback and calls.
Image: An illustration of the earphones in their case, pointing out the touch control area on the exterior of each earbud.
Specific touch control functions are typically detailed in a quick start guide included with the product. Common functions include:
- Single Tap: Play/Pause music, Answer/End call.
- Double Tap (Left/Right): Previous/Next track.
- Triple Tap (Left/Right): Volume Down/Up.
- Long Press: Activate voice assistant, Reject call.
Audio Features
- HiFi Stereo Sound: Experience clear and rich audio quality, enhanced by a 13mm graphene diaphragm.
- Low Latency Mode: Ideal for gaming, this mode ensures synchronized audio and video for an immersive experience.
- HD Call Intelligent Noise Reduction: Provides clear call quality by reducing background noise.
Image: An exploded view diagram of an earphone, illustrating the 13mm graphene diaphragm and other components responsible for delivering Hi-Fi stereo sound.
Maintenance
Cleaning
- Regularly clean the earphones and charging case with a soft, dry, lint-free cloth.
- Do not use abrasive cleaners, solvents, or aerosol sprays.
- Gently remove any earwax or debris from the ear tips and speaker mesh using a small, clean brush or cotton swab.
Water Resistance
The AOC ACT3521 earphones are rated IPX5 waterproof, meaning they are resistant to a sustained, low-pressure water jet spray. This makes them suitable for workouts and light rain.
Image: A man exercising while wearing the earphones, with an overlay indicating IPX4 water resistance (note: product description states IPX5) and the ergonomic ear hook design for secure fit during sports.
- Do not submerge the earphones in water.
- Ensure the charging port is dry before charging.
Storage
- When not in use, store the earphones in their charging case to protect them and keep them charged.
- Store in a cool, dry place away from extreme temperatures.
Troubleshooting
If you encounter issues with your AOC ACT3521 earphones, try the following solutions:
| Problem | Possible Solution |
|---|---|
| Earphones not pairing |
|
| No sound from one earbud |
|
| Charging case not charging |
|
| Poor audio quality |
|
Specifications
| Feature | Detail |
|---|---|
| Model Number | ACT3521 |
| Brand | AOC |
| Connectivity Technology | Bluetooth, Wireless |
| Wireless Technology | Bluetooth 5.4 |
| Ear Placement | On Ear (Ear Hook) |
| Form Factor | On Ear |
| Impedance | 32 Ohms |
| Frequency Response | 20 Hz |
| Control Type | Touch Control |
| Waterproof Rating | IPX5 |
| Battery Charge Time | 1 Hour (Case) |
| Material | Plastic, Silicone |
| Manufacturer | Mmd (shanghai) Electronics Technology Co.,Ltd. |
Warranty Information
The AOC ACT3521 Wireless Earphones come with a 1 Year Manufacturer Warranty. Please retain your proof of purchase for warranty claims. For specific terms and conditions, refer to the warranty card included in your product packaging or contact AOC customer support.
Customer Support
For further assistance, technical support, or warranty inquiries, please visit the official AOC website or contact their customer service department. Contact details can typically be found on the manufacturer's website or in the product packaging.
