Introduction
Thank you for choosing the Monster Open Free AC100 Open Ear Bluetooth 5.3 Headphones. These headphones are designed to provide an immersive stereo sound experience with the comfort of an open-ear design, allowing you to stay aware of your surroundings while enjoying high-quality audio. Featuring 16mm large drivers, AI noise-canceling for clear calls, and up to 30 hours of total playtime, the AC100 offers a seamless and comfortable listening experience.
The Monster Open Free AC100 headphones offer secure fit, all-day comfort, and situational awareness.
What's in the Box
Please check the package contents to ensure all items are present:
- Open Ear Headphones x 2 (Left & Right)
- Charging Case x 1
- Type-C Charging Cable x 1
- Quick Guide x 1
All components included in the Monster Open Free AC100 package.
Product Overview
The Monster Open Free AC100 headphones are engineered for comfort, sound quality, and connectivity.
Comfort Open-Ear Design
Experience true pain-free listening. The open-ear design eliminates the need to insert earbuds into the ear canal, preventing soreness and discomfort even during extended use. This design also ensures a secure fit with ergonomic ear hooks and ultra-light construction.
The open-ear design provides ultimate comfort and a secure fit.
Immersive Stereo Sound
Dive into rich sonic detail with 16mm large drivers that deliver deep bass and crisp highs, bringing every nuance of your music to life with breathtaking clarity. Directional sound technology minimizes sound leakage.
Detailed view of the 16mm large drivers for immersive stereo sound.
Crystal Clear Calls with AI Noise-Canceling
Equipped with built-in AI noise-canceling technology and dual microphones, these headphones monitor and reduce background noise, ensuring crystal-clear conversations even in noisy environments.
Enjoy clear calls with AI noise-canceling technology.
Extended Playtime
Enjoy up to 6 hours of listening on a single charge, with a total of 30 hours of playtime using the charging case. This extended battery life ensures uninterrupted audio throughout your day.
The headphones offer up to 30 hours of total playtime with the charging case.
Enhanced Awareness
The open-ear design allows you to stay connected to your surroundings. Whether commuting or exercising outdoors, ambient sounds blend seamlessly with your music, enhancing safety and awareness.
Maintain awareness of your environment while enjoying audio.
Setup: Pairing Your Headphones
The Monster Open Free AC100 headphones feature advanced Bluetooth 5.3 technology for fast and stable connections. Follow these steps to pair your headphones:
- Ensure the headphones are charged.
- Open the charging case. The headphones will automatically power on and enter pairing mode.
- On your device (smartphone, tablet, laptop), go to the Bluetooth settings.
- Search for available devices and select "Monster Open Free AC100" from the list.
- Once selected, the headphones will connect automatically. A voice prompt will confirm the connection.
The headphones will automatically pair with the last connected device when removed from the case, provided Bluetooth is enabled on the device.
Simple one-step auto pairing for quick connection.
Operating Instructions
Wearing the Headphones
For optimal comfort and sound, ensure the headphones are worn correctly:
- Confirm to take the earbuds as shown in the figure (ear hook facing up and forward).
- From top to bottom, place the ear hook behind your ear.
- Adjust the earbud for comfort and security, ensuring the speaker is positioned near your ear canal.
- The fit should be snug but comfortable, allowing for situational awareness.
Follow these steps for easy and secure wearing.
Touch Controls
The Monster Open Free AC100 headphones feature intuitive touch controls on each earbud:
- Play/Pause: Tap 1x (R/L)
- Answer/Hang up Call: Tap 1x (R/L)
- Reject Call: Hold 2s (R/L)
- Voice Assistant: Hold 2s (R/L)
- Previous Song: Tap 3x (L)
- Next Song: Tap 3x (R)
- Volume Down: Tap 2x (L)
- Volume Up: Tap 2x (R)
Detailed guide to the easy tap controls on each earbud.
Maintenance
To ensure the longevity and optimal performance of your Monster Open Free AC100 headphones, please follow these maintenance guidelines:
- Cleaning: Regularly wipe the headphones and charging case with a soft, dry, lint-free cloth. Do not use abrasive cleaners, alcohol, or chemical solvents.
- Water Resistance: These headphones are Not Water Resistant. Avoid exposure to water, rain, sweat, or excessive moisture. Do not submerge them in any liquid.
- Storage: When not in use, store the headphones in their charging case to protect them from dust and damage. Store in a cool, dry place away from extreme temperatures.
- Charging: Use only the provided Type-C charging cable and a compatible power adapter. Avoid overcharging.
Troubleshooting
If you encounter issues with your Monster Open Free AC100 headphones, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Headphones do not power on. | Low battery. | Place headphones in the charging case and charge fully. |
| Cannot pair with device. | Bluetooth is off on device; headphones not in pairing mode; interference. | Ensure Bluetooth is enabled. Open case to enter pairing mode. Move closer to device, away from other wireless signals. Forget device and re-pair. |
| No sound or low volume. | Volume too low; headphones not connected; dirty speaker mesh. | Increase volume on both headphones and device. Reconnect headphones. Gently clean speaker mesh with a dry cotton swab. |
| Intermittent connection. | Too far from device; interference; low battery. | Stay within Bluetooth range (approx. 10 meters). Avoid strong Wi-Fi signals. Charge headphones. |
| Microphone not working. | Microphone blocked; app permissions. | Ensure microphone is not covered. Check app permissions for microphone access on your device. |
Specifications
| Model Name | E18 |
| Connectivity Technology | Wireless (Bluetooth 5.3) |
| Audio Driver Type | Dynamic Driver |
| Audio Driver Size | 16 Millimeters |
| Battery Life (Single Charge) | Up to 6 hours |
| Total Playtime (with Case) | Up to 30 hours |
| Noise Control | Active Noise Cancellation (for calls) |
| Water Resistance Level | Not Water Resistant |
| Item Weight | 6.7 ounces (0.19 Kilograms) |
| Compatible Devices | Smartphones, Tablets, Laptops, Gaming Consoles, Smart Speakers |
| UPC | 810079703463 |
| Manufacturer | Monster |
Warranty and Support
Monster products are designed and manufactured to the highest quality standards. For warranty information and customer support, please refer to the warranty card included in your product packaging or visit the official Monster website. Keep your proof of purchase for any warranty claims.
For further assistance, please contact Monster customer service through their official channels.
