Monster Open Ear AC600 Headphones User Manual
Model: Monster E31
Introduction
Welcome to the user manual for your new Monster Open Ear AC600 Headphones. These wireless earbuds are designed to provide a comfortable, open-ear listening experience with high-fidelity stereo sound, clear calls, and robust water resistance. This manual will guide you through the setup, operation, maintenance, and troubleshooting of your device to ensure optimal performance and longevity.

The Monster Open Ear AC600 Headphones and their compact charging case.
What's in the Box
Please check the package contents to ensure all items are present:
- Monster Open Ear AC600 Headphones X 1
- Type-C Charging Cable X 1
- User Manual X 1

Illustration of the Monster Open Ear AC600 Headphones, charging case, Type-C charging cable, and user manual included in the package.
Product Features
Pure Monster Sound & Clip-on Design
The Monster Open Ear AC600 Headphones feature a unique digital audio processor and powerful 13mm drivers, delivering enhanced HiFi immersive stereo audio. Equipped with Qualcomm apt-X high-definition audio decoding, they restore rich sound details. The ergonomic open-ear clip design prevents complete sealing of the ear canal, reducing discomfort during extended wear and ensuring a stable and secure fit.

An exploded diagram illustrating the 13mm wide frequency driver and titanium composite diaphragm for Pure Monster Sound.

Diagram highlighting the ultra-light, skin-friendly, and painless aspects of the stable ear clip design.
DNN Noise Reduction & Crystal Clear Calls
Equipped with DNN Intelligent Noise Filtering Technology, these earbuds minimize ambient audio distractions. This allows for crystal clear calls, providing a communication experience as if you are speaking face-to-face.

Visual representation of the intelligent noise filtering technology at work, ensuring clear calls.
IPX6 Water Resistant
Designed for active lifestyles, the IPX6 water resistance rating protects the earbuds from water and sweat penetration. This makes them suitable for various harsh environments and ideal for sports activities like running, cycling, and mountaineering, without concern for heavy sweating.

An earbud shown with water droplets, signifying its rainproof, sweatproof, and splashproof capabilities.
Ultra-Long Battery Life & Bluetooth 5.4
Enjoy extended listening with up to 7 hours of playtime on a single charge, and a total of 21 hours with the charging case. A quick 10-minute charge provides 1 hour of use. The latest Bluetooth 5.4 technology ensures a fast, stable connection and low-latency audio, keeping audio and video perfectly synced.

Visual representation of the battery life: 7 hours on a single charge and 21 hours total with the charging case.
Setup
Charging the Earbuds and Case
Before first use, fully charge the earbuds and the charging case. Place the earbuds into the charging case. Connect the Type-C charging cable to the charging port on the case and plug the other end into a USB power source. The indicator lights on the case will show the charging status.
Bluetooth Pairing
- Ensure the earbuds are charged.
- Open the charging case. The earbuds will automatically enter pairing mode, indicated by a flashing light (refer to specific light indicators in the full manual if available).
- On your device (smartphone, tablet, etc.), go to Bluetooth settings and turn Bluetooth on.
- Search for available devices and select "Monster Open Ear AC600" from the list.
- Once connected, a voice prompt will confirm successful pairing, and the indicator lights will change (e.g., turn off or solid).
The earbuds will automatically reconnect to the last paired device when taken out of the case, if Bluetooth is enabled on the device.
How to Wear
For optimal comfort and sound quality, ensure the earbuds are worn correctly:

Step 1: Confirm L/R side. Step 2: Confirm the direction of the earbuds. Step 3: Adjust to the comfortable position, ensuring the clip sits securely around the ear.
Operating Instructions
Touch Controls
The Monster Open Ear AC600 Headphones feature intuitive touch controls on each earbud. Refer to the diagram below for specific functions:

Detailed guide for touch controls on the Monster Open Ear AC600 Headphones.
- Play/Pause: Double Touch on the L or R earbud.
- Voice Assistant: Touch L or R for 2 seconds.
- Answer/End Call: Double Touch on the L or R earbud.
- Reject Call: Touch L or R for 2 seconds.
- Next Track: Triple Touch on the R earbud.
- Previous Track: Triple Touch on the L earbud.
- Volume Down: Single Touch on the L earbud.
- Volume Up: Single Touch on the R earbud.
Maintenance
Cleaning
Regular cleaning helps maintain the performance and hygiene of your earbuds. Use a soft, dry, lint-free cloth to wipe the earbuds and charging case. Do not use abrasive cleaners, alcohol, or chemical solvents. Avoid getting moisture in any openings.
Storage
When not in use, store the earbuds in their charging case to protect them from dust and damage. Store the case and earbuds in a cool, dry place, away from extreme temperatures and direct sunlight.
Water Resistance
The earbuds are IPX6 water resistant, meaning they can withstand powerful water jets. However, they are not designed for submersion in water. Do not use them while swimming or showering. If they get wet, wipe them dry thoroughly before placing them back in the charging case.
Troubleshooting
- Earbuds not pairing: Ensure both earbuds are charged. Place them back in the case, close the lid, wait a few seconds, then open the lid to re-enter pairing mode. Check your device's Bluetooth settings and try reconnecting.
- Only one earbud working: Try placing both earbuds back in the charging case, closing the lid, and then taking them out again. Ensure both are charged. If the issue persists, try resetting the earbuds (refer to the full manual for specific reset procedures if available).
- No sound or low volume: Check the volume level on both your connected device and the earbuds. Ensure the earbuds are properly seated in your ears.
- Charging issues: Ensure the charging cable is securely connected to both the case and the power source. Try a different USB port or power adapter. Clean the charging contacts on the earbuds and inside the case with a dry cotton swab.
- Poor call quality: Ensure the earbuds are properly positioned. Check for any obstructions near the microphone. Move closer to your connected device to avoid signal interference.
Specifications
| Feature | Specification |
|---|
| Model Name | Monster Open Ear AC600 |
| Item Model Number | Monster E31 |
| Connectivity Technology | Wireless (Bluetooth) |
| Bluetooth Version | 5.4 |
| Bluetooth Range | 33 Feet (10 meters) |
| Audio Driver Type | Dynamic Driver |
| Battery Life (Single Charge) | 7 Hours |
| Battery Life (With Charging Case) | 21 Hours |
| Charging Time | 2 Hours (for full charge) |
| Control Type | Touch Control |
| Water Resistance Level | IPX6 Water Resistant |
| Ear Placement | Open Ear |
| Material | Plastic |
| Item Weight | 5.3 ounces |
| Compatible Devices | Any Bluetooth-enabled device (smartphones, tablets, MP3 players, TVs, laptops) |
Warranty and Support
For warranty information and technical support, please refer to the warranty card included in your product packaging or visit the official Monster website. If you encounter any issues not covered in this manual, please contact Monster customer service for assistance.