Introduction
Welcome to the user manual for your Monster Open Ear AC339 Earbuds. These earbuds are designed to provide a comfortable listening experience with an open-ear design, allowing you to stay aware of your surroundings while enjoying high-quality audio. Featuring Bluetooth 6.0 connectivity, IPX6 water resistance, and intuitive touch controls, these earbuds are suitable for various activities. Please read this manual carefully to ensure proper use and optimal performance of your device.
An overhead view of the Monster Open Ear AC339 earbuds, showing both left and right earbuds alongside their charging case. The earbuds feature an open-ear clip design, and the charging case has a digital display for battery status.
Package Contents
Ensure all items are present in the package:
- Monster Open Ear AC339 Earbuds (Left and Right)
- Wireless Charging Case
- USB Charging Cable (Type-C)
- User Manual
Product Overview
The Monster Open Ear AC339 earbuds are designed for comfort and functionality. Each earbud weighs approximately 5.1 grams, providing a lightweight and pressure-free fit. The charging case features a digital display to indicate battery levels.
A close-up image of a Monster Open Ear AC339 earbud comfortably clipped onto a person's ear, illustrating its lightweight design (5.2g per earbud) and secure fit.
An image demonstrating the secure and supportive open-ear design of the Monster AC339 earbuds, highlighting how they are designed to stay in place without easily falling off, even during activity.
Setup
1. Initial Charging
Before first use, fully charge the earbuds and the charging case.
- Connect the USB charging cable to the charging port on the case and to a power source.
- The digital display on the charging case will show the battery level during charging.
- Place the earbuds into the charging case. Ensure they are correctly seated; the earbuds will begin charging automatically.
- A full charge for the case typically takes approximately 2 hours. The earbuds will charge while in the case.
The Monster Open Ear AC339 earbuds and their charging case, with text indicating an extended battery life of up to 40 hours and a two-hour fast charging capability for the case.
2. Bluetooth Pairing
Pair your earbuds with your device to begin listening.
- Open the charging case. The earbuds will automatically power on and enter pairing mode.
- On your device (smartphone, tablet, etc.), enable Bluetooth.
- Search for available Bluetooth devices and select "Monster AC339" from the list.
- Once connected, you will hear a confirmation tone, and the earbuds will be ready for use.
- The earbuds will automatically reconnect to the last paired device when taken out of the case, if Bluetooth is enabled on the device.
Operating Instructions
The Monster Open Ear AC339 Earbuds feature multi-function touch controls on each earbud.
A visual representation of the touch control area on the Monster Open Ear AC339 earbuds, indicating sensitive binaural touch control for various functions.
Music Control
- Play/Pause: Single tap on either earbud.
- Next Track: Double tap the right earbud.
- Previous Track: Double tap the left earbud.
Call Management
- Answer/End Call: Single tap on either earbud.
- Reject Call: Long press on either earbud.
Voice Assistant
- Activate Voice Assistant: Triple tap on either earbud.
Power On/Off
- Power On: Open the charging case, or long press the touch area on both earbuds if they are outside the case and off.
- Power Off: Place the earbuds back into the charging case and close the lid, or long press the touch area on both earbuds until they power off.
Maintenance
Cleaning
To maintain optimal performance and hygiene:
- Gently wipe the earbuds and charging case with a soft, dry, lint-free cloth.
- Do not use abrasive cleaners, solvents, or aerosol sprays.
- Keep charging contacts clean and free of debris.
Storage
When not in use, store the earbuds in their charging case to protect them from dust and damage.
IPX6 Water Resistance
The earbuds are IPX6 water-resistant, meaning they can withstand strong jets of water from any direction. This makes them suitable for workouts and light rain exposure. However, they are not designed for submersion in water. Avoid exposing them to saltwater, chlorinated water, or other liquids that may cause damage.
The Monster Open Ear AC339 earbuds shown with water droplets, illustrating their IPX6 water-resistant design, suitable for protection against sweat and light rain.
Troubleshooting
If you encounter issues with your earbuds, refer to the following common problems and solutions:
- Earbuds not pairing with device:
- Ensure Bluetooth is enabled on your device.
- Make sure the earbuds are charged and out of the charging case.
- Forget/delete "Monster AC339" from your device's Bluetooth list and try pairing again.
- Restart your device.
- No sound from one earbud:
- Place both earbuds back into the charging case, close the lid, wait a few seconds, then take them out again.
- Ensure both earbuds are charged.
- Try resetting the earbuds (refer to the full product manual on the Monster website for specific reset instructions if needed).
- Charging issues:
- Check if the charging cable is securely connected to both the case and the power source.
- Ensure the charging contacts on the earbuds and inside the case are clean and free of debris.
- Try a different USB charging cable or power adapter.
- Touch controls unresponsive:
- Ensure your fingers are clean and dry when touching the control area.
- Restart the earbuds by placing them in the case and taking them out again.
Specifications
| Model Name | AC339 (E98) |
| Brand | Monster |
| Connectivity Technology | Wireless (Bluetooth) |
| Bluetooth Version | 6.0 |
| Ear Placement | Open Ear |
| Control Method | Touch |
| Water Resistance Level | IPX6 |
| Battery Life | Up to 40 Hours (with charging case) |
| Charging Time (Case) | Approx. 2 Hours |
| Earbud Weight | Approx. 5.1 grams (each) |
| Compatible Devices | Cellphones, Tablets, Laptops, Smart Speaker |
| Material | Plastic |
An exploded diagram showcasing the internal acoustic components of the Monster Open Ear AC339 earbuds, emphasizing the design for rich, deep bass, clear vocals, and pristine highs.
Warranty and Support
Warranty Information
Monster products are manufactured to the highest quality standards. For detailed warranty information, please refer to the warranty card included in your package or visit the official Monster website. The warranty covers manufacturing defects under normal use.
Customer Support
If you have any questions, require technical assistance, or need to report an issue, please contact Monster customer support. You can find contact information, including email and phone numbers, on the official Monster website: www.monsterproducts.com/support
