Introduction
Thank you for choosing Monster Open Ear AC600 Headphones. These wireless earbuds are designed to provide a comfortable, open-ear listening experience with high-fidelity stereo sound, extended battery life, and robust water resistance. This manual provides detailed instructions for setup, operation, maintenance, and troubleshooting to ensure optimal performance and longevity of your device.
What's in the Box?

This image displays the complete contents of the product packaging, including the Monster Open Ear AC600 Earbuds, their charging case, and the accompanying USB-C charging cable.
- Monster Open Ear AC600 Earbuds x 1 pair
- Charging Case x 1
- Type-C Charging Cable x 1
- User Manual x 1
Setup
Initial Charging
Before first use, fully charge the earbuds and the charging case. Connect the provided Type-C charging cable to the charging port on the case and a USB power source. The indicator lights on the case will show the charging status.
Bluetooth Pairing
- Ensure the earbuds are in the charging case and the case has power.
- Open the charging case. The earbuds will automatically enter pairing mode, indicated by a flashing light on the earbuds.
- On your device (smartphone, tablet, laptop), go to Bluetooth settings and turn on Bluetooth.
- Search for available devices and select "Monster AC600" from the list.
- Once connected, a voice prompt will confirm successful pairing, and the earbud indicator lights will turn off or show a steady light.
- If pairing fails, place the earbuds back in the case, close the lid, wait a few seconds, and repeat the steps.
Operating Instructions
How to Wear

This diagram illustrates the correct method for wearing the Monster Open Ear AC600 headphones. It guides users to confirm the left (L) and right (R) earbuds, ensure the correct direction for placement, and adjust them to a comfortable and secure position on the ear.
- Confirm L/R Side: Identify the left (L) and right (R) earbuds.
- Confirm Direction: Position the earbud so the clip-on design comfortably wraps around the back of your ear, with the speaker portion resting near your ear canal.
- Adjust for Comfort: Gently adjust the earbud until it sits securely and comfortably without causing pressure. The open-ear design allows for ambient awareness.
Touch Controls

| Function | Action | Earbud |
|---|---|---|
| Play/Pause | Double Touch | L or R |
| Voice Assistant | Touch for 2s | L or R |
| Answer/End Call | Double Touch | L or R |
| Reject Call | Touch for 2s | L or R |
| Next Track | Triple Touch | R |
| Previous Track | Triple Touch | L |
| Volume Down | Single Touch | L |
| Volume Up | Single Touch | R |
Maintenance
Cleaning
Regular cleaning helps maintain sound quality and hygiene. Use a soft, dry, lint-free cloth to wipe the earbuds and charging case. Do not use harsh chemicals, cleaning sprays, or abrasive materials. For the speaker mesh, gently brush away any debris with a soft, dry brush.
Storage
When not in use, store the earbuds in their charging case to protect them from dust and damage. Store the case in a cool, dry place away from extreme temperatures and direct sunlight.
Battery Care
To prolong battery life, avoid fully discharging the earbuds and case frequently. Charge them regularly, even if not used for extended periods. The headphones offer up to 7 hours of playback on a single charge and up to 21 hours total with the charging case. A quick 10-minute charge provides 1 hour of listening time.

This image highlights the impressive battery performance of the headphones, detailing 7 hours of playback from a single charge and a total of 21 hours when utilizing the charging case. It also emphasizes the quick charge capability: 10 minutes of charging provides 1 hour of listening.
Water Resistance (IPX6)
The Monster Open Ear AC600 Headphones are IPX6 water resistant, meaning they are protected against powerful jets of water. This makes them suitable for workouts and outdoor activities where they might be exposed to sweat or rain. However, they are not designed for submersion in water. Do not use them while swimming or showering.

This image visually represents the IPX6 water resistance rating of the headphones, showing water droplets on their surface, indicating protection against splashes and sweat.
Troubleshooting
If you encounter any issues with your Monster Open Ear AC600 Headphones, please refer to the following common solutions:
- No Sound:
- Ensure earbuds are charged.
- Check if Bluetooth is enabled on your device and the earbuds are connected.
- Adjust volume on both the earbuds and your connected device.
- Try re-pairing the earbuds with your device.
- Earbuds Not Pairing:
- Make sure earbuds are fully charged.
- Place earbuds back in the case, close the lid, wait 5 seconds, then open to re-enter pairing mode.
- Turn off and on Bluetooth on your device.
- Forget/delete "Monster AC600" from your device's Bluetooth list and try pairing again.
- One Earbud Not Working:
- Ensure both earbuds are charged.
- Place both earbuds back in the charging case, close the lid, and then open it again.
- Try resetting the earbuds (refer to manufacturer's website for specific reset instructions if needed).
- 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.
Specifications
| Feature | Detail |
|---|---|
| Model Name | E31 |
| Connectivity Technology | Wireless (Bluetooth) |
| Wireless Communication Technology | Bluetooth 5.4 |
| Earpiece Shape | Clip-on |
| Ear Placement | Open Ear |
| Control Method | Touch |
| Battery Life | 21 Hours (with charging case) |
| Water Resistance Level | IPX6 (Waterproof) |
| Noise Control | Environmental Noise Cancellation (ENC) |
| Audio Driver Type | Dynamic Driver |
| Frequency Range | 20 Hz - 20,000 Hz |
| Compatible Devices | Smartphones, Laptops, Tablets, Smart Speakers |
| Item Weight | 5.3 ounces |
| Manufacturer | Monster |
Warranty and Support
Monster products are designed and manufactured to the highest quality standards. For information regarding warranty coverage, technical support, or service, please visit the official Monster website or contact their customer service. Keep your purchase receipt as proof of purchase for warranty claims.
Official Website: www.monsterproducts.com







