1. Product Overview
The Monster AC330 are innovative wireless open-ear headphones designed for comfort, high-fidelity audio, and active lifestyles. Featuring Bluetooth 5.4 for stable connectivity, HD call microphones with noise reduction, and IPX5 waterproofing, these headphones are suitable for various activities from daily commutes to sports.
Figure 1: Monster AC330 Key Features
Video 1: Product demonstration showcasing design, features, and usage.
2. Package Contents
Please check the box for the following items:
- 1 pair of Monster AC330 Bluetooth Headphones (Left ear + Right ear)
- 1 Charging Case
- 1 Type-C Charging Cable
- 1 User Manual
- 1 Warranty Card
- 1 Certificate
Figure 2: Package Contents
3. Setup and Charging
3.1 Initial Charging
- Place both headphones into the charging case.
- Connect the provided Type-C charging cable to the charging port on the case and a suitable USB power source.
- The charging case has a built-in 350mAh battery. The headphones have a 50mAh battery each.
- Headphone charging time: Approximately 1-1.5 hours.
- Charging case charging time: Approximately 1-2 hours.
Figure 3: Battery Life and Charging Overview
3.2 Bluetooth Pairing
- Ensure the headphones are charged.
- Open the charging case. The headphones will automatically enter pairing mode.
- On your device (smartphone, tablet, etc.), enable Bluetooth and search for available devices.
- Select "Monster AC330" from the list to connect.
- Once connected, the headphones will provide an audio confirmation.
Figure 4: Bluetooth 5.4 Connectivity
3.3 Wearing the Headphones
The Monster AC330 features an open ergonomic design for comfortable and secure wear without entering the ear canal.
- Gently place the ear hook over your ear.
- Adjust the earbud part to rest comfortably near your ear canal.
- The three-point support structure ensures a stable fit, ideal for active use.
Figure 5: Ergonomic Design and Wearing Comfort
4. Operating Instructions
4.1 Touch Controls
The AC330 headphones feature intuitive touch controls on each earbud:
- Knock Once: Adjust Volume (Left earbud for Volume Down, Right earbud for Volume Up).
- Knock Twice: Play/Pause music (L/R), Answer/End calls (L/R).
- Knock Three Times: Previous Song (Left earbud), Next Song (Right earbud).
- Long Press for Two Seconds: Wake up voice assistant (L/R), Reject Calls (L/R).
Figure 6: One-Hand Touch Controls
4.2 Call Functions
The headphones are equipped with multi-microphone DNN intelligent noise filtering technology for clear calls.
- Answering/Ending Calls: Knock twice on either earbud.
- Rejecting Calls: Long press either earbud for two seconds.
Figure 7: HD Call Quality with Noise Reduction
5. Maintenance and Care
5.1 Waterproofing
The Monster AC330 headphones are IPX5 waterproof, making them resistant to sweat and light rain. They are suitable for daily sports and outdoor activities. Note: The charging case is NOT waterproof.
Figure 8: IPX5 Waterproof Rating
5.2 Cleaning
To maintain optimal performance and hygiene, regularly clean your headphones. Use a soft, dry cloth to wipe the earbuds and charging case. If a cleaning kit was included (as shown in some product images), follow its specific instructions for use.
Figure 9: Black Headphones with Optional Cleaning Kit
6. Troubleshooting
- No Sound/Connection Issues: Ensure headphones are charged and within 10m of your device. Re-pair the headphones by placing them in the case, closing, then reopening to re-enter pairing mode.
- Poor Call Quality: Ensure microphones are not obstructed. The multi-microphone DNN intelligent noise filtering technology should provide clear calls even in busy environments.
- Unresponsive Touch Controls: Ensure your fingers are clean and dry. Try resetting the headphones by placing them in the charging case and closing the lid for a few seconds.
- Charging Problems: Verify the Type-C cable is securely connected to both the charging case and the power source. Check if the charging indicator lights are active.
7. Specifications
| Feature | Specification |
|---|---|
| Product Brand | Monster |
| Model Name | Monster AC330 Wireless Bluetooth Headphones |
| Style | Open-ear (Ear hanging type) |
| Material | Metal, Plastic |
| Bluetooth Version | 5.4 |
| Maximum Wireless Range | <10m |
| Headphone Battery Capacity | 50mAh (per earphone) |
| Charging Case Battery Capacity | 350mAh |
| Battery Life (Single Play) | Around 8 Hours |
| Total Play Time (with Charging Case) | Up to 30 Hours |
| Talk Time | Around 7 Hours |
| Standby Time | Up to 24 Hours |
| Headphone Charging Time | 1-1.5 Hours |
| Charging Case Charging Time | 1-2 Hours |
| Charging Method | Charging case |
| Charging Interface | Type-C |
| Waterproof Rating | IPX5 (Headset only, charging bin is not waterproof) |
| Driver Diameter | 14.2mm |
| Vocalism Principle | Dynamic |
| Frequency Response Range | 20 - 20000Hz |
| Sensitivity | 28dB |
| Resistance | 16Ω |
| Impedance Range | up to 32 Ω |
| Max Output | 10mW |
| Total Harmonic Distortion | 1% |
| Audio Codecs | AAC, SBC |
| With Microphone | Yes |
| Volume Control | Yes |
| Active Noise-Cancellation | No (Features Call Noise Reduction) |
| Sound Isolating | Yes |
| Certification | CE |
Figure 10: Product Performance Parameters
8. User Tips
- Secure Fit for Activity: The open-ear design with a three-point support structure is excellent for sports. Ensure you adjust them for a firm fit to prevent falling off during movement.
- Comfort for Long Wear: The open-ear, non-in-ear wearing method is designed to be painless and ear-free, making them comfortable for extended listening sessions.
- Easy Portability: Consider using a silicone lanyard (if available or purchased separately) with the charging case for convenient carrying, especially when on the go.
- Optimal Call Clarity: For the best call experience, ensure you are in a reasonably quiet environment, although the multi-microphone noise reduction works well in moderately noisy settings.
Figure 11: Silicone Lanyard for Easy Carrying
9. Warranty and Support
Your Monster AC330 Wireless Open Ear Headphones come with a warranty as detailed in the included Warranty Card. Please refer to the card for specific terms and conditions.
For technical support, troubleshooting assistance, or warranty claims, please contact the seller or manufacturer's customer service through the contact information provided with your purchase or on the official Monster website.
