Introduction
Thank you for choosing the Monster Open Ear AC322 Bluetooth Headphones. These headphones are designed to provide a comfortable listening experience while keeping you aware of your surroundings. Featuring Bluetooth 5.4, IPX5 waterproofing, and a long battery life, they are suitable for various activities from daily commutes to intense workouts. Please read this manual carefully to ensure proper use and maintenance of your device.
What's in the Box
- Monster Open Ear AC322 Headphones (Left and Right)
- Wireless Charging Case
- USB-C Charging Cable
- User Manual
Product Overview
The Monster Open Ear AC322 headphones are designed for comfort and performance. Below are the key components and features.

Image: Monster Open Ear AC322 headphones in their charging case.
Key Features:
- Open-Ear Design: Allows awareness of surroundings for safety.
- Pure Monster Sound: Delivers high-quality audio with deep bass.
- Bluetooth 5.4: Ensures fast, stable, and low-latency wireless connections.
- 36 Hours Battery Life: Extended playtime with the charging case.
- IPX5 Waterproof: Resistant to sweat and rain, ideal for workouts.
- Ergonomic & Adjustable Ear Hooks: Provides a secure and comfortable fit for various ear sizes.
- Clear Communication: Designed for clear calls even in noisy environments.

Image: Overview of key features including Bluetooth 5.4, IPX5 Waterproof, Comfort Fit, Long Battery Life, Clear Call, and Angle Adjustable.

Image: A person wearing the Monster Open Ear AC322 headphones, highlighting the ergonomic, secure, and ultra-light design.
Setup
Charging the Headphones and Case:
Before first use, fully charge the headphones and the charging case. Place the headphones into the charging case. Connect the USB-C charging cable to the charging port on the case and the other end to a USB power source. The indicator light on the case will show charging status.

Image: The Monster Open Ear AC322 headphones inside their charging case, illustrating the long battery life of 36 hours.
Pairing with a Device:
- Ensure the headphones are charged.
- Open the charging case. The headphones will automatically enter pairing mode.
- On your device (smartphone, tablet, etc.), go to Bluetooth settings and turn Bluetooth on.
- Select "Monster Open Ear AC322" from the list of available devices.
- Once connected, you will hear an audio prompt, and the indicator light on the headphones will change.

Image: Illustration of the Monster Open Ear AC322 headphones connecting to a smartphone via Bluetooth 5.4.
The headphones support one-step pairing for convenience and wide compatibility with various devices.

Image: Demonstrates wide compatibility and easy one-click pairing with devices like laptops and smartphones.
Operating Instructions
Wearing the Headphones:
Gently place the ear hooks over your ears, ensuring the speaker part is positioned comfortably near your ear canal. The ear hooks are adjustable to provide a secure and comfortable fit. Adjust the angle for optimal comfort and sound.

Image: Close-up of the Monster Open Ear AC322 on an ear, showing the adjustable design with 45-degree and 25-degree rotation capabilities for enhanced comfort and stability.
Touch Controls:
The headphones feature touch controls for easy management of music and calls. Refer to the quick start guide for specific tap functions (e.g., single tap for play/pause, double tap for next track, etc.).
Making Calls:
The integrated microphone allows for clear communication. Answer or end calls using the touch controls. The open-ear design ensures you can hear your surroundings while on a call.

Image: A person using the Monster Open Ear AC322 headphones for a call, emphasizing the clear call quality even in noisy environments.
Staying Aware:
The open-ear design is a key safety feature, allowing you to hear ambient sounds like traffic or announcements while enjoying your audio. This is particularly useful for outdoor activities or in busy environments.

Image: A person driving a truck while wearing the Monster Open Ear AC322 headphones, illustrating the "Stay Aware" feature that allows hearing surroundings for added safety.
Maintenance
- Clean the headphones regularly with a soft, dry cloth.
- Avoid using abrasive cleaners or solvents.
- Store the headphones in their charging case when not in use to protect them and keep them charged.
- While IPX5 waterproof, avoid submerging the headphones in water. Dry them thoroughly if they get wet.

Image: The Monster Open Ear AC322 headphones and charging case with water droplets, demonstrating their IPX5 waterproof rating and resistance to sweat and rain.
Troubleshooting
No Sound:
- Ensure headphones are powered on and connected to your device.
- Check the volume levels on both the headphones and your device.
- Re-pair the headphones with your device.
Cannot Pair:
- Make sure Bluetooth is enabled on your device.
- Ensure headphones are in pairing mode (open the case).
- Move the headphones closer to your device.
- Forget the device in your Bluetooth settings and try pairing again.
Charging Issues:
- Check if the charging cable is securely connected.
- Ensure the charging port is clean and free of debris.
- Try a different USB power source or cable.
Specifications
| Feature | Detail |
|---|---|
| Model Name | E65 |
| Connectivity Technology | Wireless (Bluetooth 5.4) |
| Battery Life | Up to 36 Hours (with charging case) |
| Water Resistance Level | IPX5 (Waterproof) |
| Frequency Range | 20 Hz - 20,000 Hz |
| Control Method | Touch |
| Earpiece Shape | Ear Hook |
| Item Weight | 6.4 Ounces |
| Product Dimensions | 2 x 2 x 2 inches |
| UPC | 810079703609 |
Warranty and Support
Monster products are built with quality and reliability in mind. For warranty information, technical support, or service inquiries, please refer to the warranty card included in your product packaging or visit the official Monster website. Keep your proof of purchase for warranty claims.
For additional assistance, you may contact Monster customer service through their official channels.





