Introduction
Welcome to the Monster AC210 TWS Open Ear Bluetooth Headphones user manual. These true wireless headphones are designed for comfort, safety, and high-quality audio, featuring an open-ear design that allows you to stay aware of your surroundings while enjoying your music or calls. With advanced Bluetooth 5.4 technology, HD call noise reduction, and HIFI sound, the AC210 provides a superior listening experience for sports, daily use, and more.
Package Contents
Please check the box for the following items:
- Headphones (Left and Right) x 1 pair
- Charging Compartment x 1
- USB Charging Cable (Type-C) x 1
- Instructions Manual x 1
- Warranty Card x 1
- Certificate of Conformity x 1
Specifications
| Feature | Specification |
|---|---|
| Brand | MONSTER |
| Model | AC210 |
| Ear Entry Method | Open Ear Style |
| Bluetooth Version | 5.4 |
| Communication | Wireless |
| Wireless Range | <10m |
| Single Ear Weight | 5.5 g |
| Headphone Playback Time (50% volume) | Approx. 5 hours |
| Total Playback Time (with Charging Case) | Up to 20 hours (case provides 3 full charges) |
| Charging Interface | Type-C |
| Battery Capacity (Earbuds) | 250mAh (likely total for case, single earbud capacity not specified) |
| Noise Reduction Type | ENC Environment Noise Reduction (for calls) |
| Active Noise-Cancellation | No |
| Waterproof Grade | IPX5 |
| Frequency Response Range | 20 - 20000Hz |
| Impedance Range | Up to 32 Ω |
| Resistance | 32Ω |
| Sensitivity | 32dB |
| Vocalism Principle | Dynamic |
| Codecs | AAC |
| With Microphone | Yes |
| Volume Control | Yes |
| Material | Silica Gel |
Note: The product title mentions Bluetooth 5.3, however, detailed specifications and product images indicate Bluetooth 5.4. This manual refers to Bluetooth 5.4.
Setup Guide
1. Charging the Earbuds and Case
Before first use, fully charge the Monster AC210 headphones and their charging case. Connect the provided Type-C USB cable to the charging port on the case and a suitable power source.
- The charging case provides approximately 3 full charges for the earbuds, extending total playback time up to 20 hours.
- A full charge for the battery compartment takes approximately 1 hour.
2. Wearing the Earbuds
The Monster AC210 features an open-ear design for comfort and situational awareness. Gently place each earbud over your ear, ensuring the speaker is positioned near your ear canal without entering it. Adjust for a secure and comfortable fit.
3. Bluetooth Pairing
To connect your Monster AC210 headphones to your device:
- Open the charging case. The earbuds will automatically enter pairing mode.
- On your smartphone or Bluetooth-enabled device, go to the Bluetooth settings.
- Turn on Bluetooth.
- Look for "Monster Open Ear AC210" in the list of available devices and select it to connect.
- Once connected, you will hear an audio prompt, and the device will show "Connected".
Operating Instructions
The Monster AC210 headphones feature intuitive touch controls on the multifunction key (MFB) located on each earbud.
| Function | Action |
|---|---|
| Pause/Play Music | Double click on the multifunction key (either left or right earbud). |
| Volume Up/Down | Click on the multifunction key. (Specific ear for +/- may vary, refer to product for exact assignment). |
| Previous Song | Lightly tap 3 times in the left ear. |
| Next Song | Lightly tap 3 times in the right ear. |
| Voice Assistant | When connected, press and hold for 2 seconds (either left or right earbud). |
| Reject Call | Long press for 2 seconds (either left or right earbud). |
| Answer/End Call | Tap 2 times (either left or right earbud). |
Sound Features
The AC210 headphones are engineered for a rich audio experience:
- Pure Magic Sound: Equipped with a composite titanium metal diaphragm and OFC high-purity multi-track voice coil for perfect sound quality and digital sound enhancement.
- Directional Transmission: Targeted sound field transmission technology minimizes sound leakage while providing three-dimensional sound quality.
- 360° Panoramic Sound: Creates a spatial stereo sound field, reducing sound resonance for an immersive listening experience.
Maintenance
- Cleaning: Use a soft, dry, lint-free cloth to clean the earbuds and charging case. Avoid using harsh chemicals, cleaning solvents, or strong detergents.
- Storage: Always store the earbuds in their charging case when not in use to protect them and keep them charged. Store in a cool, dry place away from extreme temperatures.
- Water Resistance: The AC210 headphones are IPX5 waterproof, meaning they are resistant to sweat and light splashes of water. Do not submerge them in water or expose them to heavy rain. Ensure they are dry before placing them back in the charging case.
Troubleshooting
- Earbuds not pairing:
- Ensure both earbuds are charged and removed from the charging case.
- Verify that Bluetooth is enabled on your device.
- Make sure the earbuds are within the 10m wireless range of your device.
- Try forgetting "Monster Open Ear AC210" from your device's Bluetooth list and re-pairing.
- No sound or low volume:
- Check the volume levels on both your connected device and the earbuds.
- Ensure the earbuds are properly connected to your device.
- Restart your device and reconnect the earbuds.
- Charging issues:
- Ensure the Type-C charging cable is securely connected to both the case and the power source.
- Clean the charging contacts on the earbuds and inside the charging case with a dry cotton swab to remove any dust or debris.
- Try using a different charging cable or power adapter.
- Call quality issues (HD Call Noise Reduction):
- The AC210 features ENC (Environment Noise Reduction) for calls. Ensure the microphone is not obstructed.
- Move to a quieter environment if possible, as ENC reduces ambient noise but cannot eliminate all sounds.
High definition calls with noise reduction
User Tips
- Situational Awareness: The open-ear design is ideal for outdoor activities like running or cycling, allowing you to hear traffic and other important environmental sounds for safety.
- Comfort for Long Wear: Weighing only 5.5g per ear, these headphones are designed for extended comfortable wear without causing ear fatigue or swelling.
- Optimal Call Clarity: For the best call experience with ENC noise reduction, ensure the microphone area on the earbuds is clear and unobstructed.
- Bluetooth Version: While the product title may state Bluetooth 5.3, the actual product and its features are based on Bluetooth 5.4 for enhanced connectivity and lower latency.
Warranty and Support
For detailed warranty information, terms, and conditions, please refer to the Warranty Card included in your product package. If you encounter any issues or require further assistance, please contact the seller or manufacturer's customer support.
