Introduction
This manual provides detailed instructions for the Monster Open Ear AC322 Bluetooth 5.4 Headset, Model E65. Please read this manual thoroughly before using the product to ensure proper operation and to maintain its performance. Keep this manual for future reference.
What's in the Box
- Monster Open Ear AC322 Headset (Left and Right Earbuds)
- Wireless Charging Case
- USB Charging Cable
- User Manual (this document)
Product Overview
The Monster Open Ear AC322 headset features an open-ear design for comfort and situational awareness, Bluetooth 5.4 connectivity, and IPX5 water resistance.
Components
- Earbuds: Each earbud includes a speaker, microphone, and control area.
- Ear Hooks: Adjustable ear hooks for a secure and comfortable fit.
- Charging Case: Stores and charges the earbuds. Features a charging indicator.

Image: The Monster Open Ear AC322 headset, showing both earbuds and the charging case. The earbuds feature an open-ear design with ear hooks.
Controls
The headset utilizes push button controls for various functions.
- Power On/Off: Press and hold the control button.
- Play/Pause: Single press the control button.
- Next Track: Double press the right earbud control button.
- Previous Track: Double press the left earbud control button.
- Answer/End Call: Single press the control button during an incoming call.
- Reject Call: Press and hold the control button during an incoming call.
- Activate Voice Assistant: Triple press the control button.
Setup
Charging the Headset
- Place both earbuds into the charging case.
- Connect the USB charging cable to the charging case and a power source.
- The indicator lights on the charging case will show the charging status. A full charge provides up to 36 hours of battery life with the charging case.

Image: The Monster Open Ear AC322 charging case open, with both earbuds inside, illustrating the charging setup. The image highlights the 36-hour battery life.
Pairing with a Device
- Ensure the earbuds are charged.
- Open the charging case. The earbuds will automatically enter pairing mode.
- On your device (smartphone, laptop, etc.), enable Bluetooth.
- Search for "Monster Open Ear AC322" in the list of available Bluetooth devices.
- Select "Monster Open Ear AC322" to connect. A voice prompt will confirm successful pairing.

Image: A smartphone screen displaying Bluetooth settings, showing "Monster Open Ear AC322" as a connected device, alongside the earbuds and charging case, demonstrating the pairing process.
Operating Instructions
Wearing the Headset
The AC322 features an ergonomic, open-ear design with adjustable ear hooks for a secure and comfortable fit. Adjust the ear hooks to fit snugly around your ears.

Image: Diagram illustrating the adjustable ear hooks of the Monster Open Ear AC322, showing 45-degree and 25-degree adjustment ranges for a customizable fit.
Making Calls
The headset supports clear communication with its built-in microphones.
- Answer/End Call: Single press the control button.
- Reject Call: Press and hold the control button.
Listening to Music
Enjoy high-quality audio with Pure Monster Sound.
- Play/Pause: Single press the control button.
- Next Track: Double press the right earbud control button.
- Previous Track: Double press the left earbud control button.
Maintenance
Cleaning
- Wipe the earbuds and charging case with a soft, dry cloth.
- Do not use abrasive cleaners or solvents.
- The earbuds are IPX5 waterproof, meaning they are resistant to sweat and light rain. Do not submerge them in water.

Image: The Monster Open Ear AC322 earbuds shown with water droplets, illustrating their IPX5 waterproof rating, indicating resistance to sweat and rain.
Storage
- Store the headset in its charging case when not in use to protect it and keep it charged.
- Avoid extreme temperatures and direct sunlight.
Troubleshooting
| Problem | Solution |
|---|---|
| Headset does not power on. | Ensure the earbuds are charged. Place them in the charging case and connect the case to power. |
| Cannot pair with device. |
|
| No sound or low volume. |
|
| Charging case not charging earbuds. |
|
Specifications
| Feature | Detail |
|---|---|
| Brand | Monster |
| Model Number | E65 |
| Ear Placement | Open Ear |
| Connectivity Technology | Wireless (Bluetooth) |
| Bluetooth Version | 5.4 |
| Battery Life (with case) | Up to 36 Hours |
| Water Resistance | IPX5 (Sweat and Rain Resistant) |
| Control Method | Push Button |
| Audio Driver Type | Dynamic Driver |
| Frequency Range | 20 Hz to 20,000 Hz |
| Material | Silicone Plastic |
| Weight | 0.18 Kilograms |
| UPC | 810079703883 |
Official Product Video
Video: An official product video showcasing the Monster Open Ear AC322 headset's features, including its open-ear ergonomic design, skin-friendly silicone material, IPX5 waterproof rating, 36-hour battery life, ENC with 4-mic HD call noise reduction, and latest Bluetooth 5.4 for faster and more stable transmission.
Warranty and Support
For warranty information and customer support, please refer to the official Monster website or contact their customer service department. Keep your purchase receipt as proof of purchase.
Manufacturer: Monster