1. Introduction
Welcome to the Monster Open AC601 Bluetooth Earbuds user manual. This guide provides essential information for setting up, operating, and maintaining your new wireless earbuds. Please read this manual thoroughly before use to ensure optimal performance and longevity of your device.
2. Package Contents
Verify that all items are present in your package:
- Monster Open AC601 Bluetooth Earbuds (Left and Right)
- Charging Case
- USB Charging Cable
- User Manual
3. Product Overview
The Monster Open AC601 earbuds are designed for comfort and high-fidelity audio. They feature an open-ear clip design, Bluetooth 5.4 connectivity, Environmental Noise Cancellation (ENC) for calls, and touch controls.

Figure 3.1: Monster Open AC601 Bluetooth Earbuds and their charging case. The earbuds are light blue with a metallic accent, and the charging case is a matching light blue with a transparent lid.

Figure 3.2: Diagram illustrating the 13mm speaker dynamic audio and acoustic cavity structure within the earbud, highlighting the components responsible for sound production.
4. Setup
4.1. Initial Charging
Before first use, fully charge the earbuds and the charging case. Connect the provided USB charging cable to the charging case and a power source. The indicator lights on the case will show the charging status.
4.2. Pairing with a Device
- Open the charging case. The earbuds will automatically enter pairing mode.
- On your device (smartphone, tablet, etc.), enable Bluetooth.
- Search for "Monster Open AC601" in the list of available Bluetooth devices.
- Select it to connect. Once connected, you will hear an audio prompt, and the indicator lights on the earbuds will change.

Figure 4.1: Visual representation of the upgraded Bluetooth 5.4 technology, indicating a stable connection, synchronized audio-video playback, and a 90% increase in transmission rate compared to Bluetooth 5.0.
5. Wearing Instructions
The Monster Open AC601 earbuds feature a comfortable clip-on design for secure fit without entering the ear canal.
- Identify the small part and the big part of the earbud.
- Place the small part into your ear.
- Clip the larger part of the earbud onto your outer ear.
- Adjust the earbud to a comfortable and secure position. The flexible design allows for various ear shapes.

Figure 5.1: Step-by-step visual guide on how to properly wear the Monster Open AC601 earbuds, showing placement of the small part in the ear and clipping the larger part around the outer ear for a comfortable fit.

Figure 5.2: A woman wearing the Monster Open AC601 earbuds, demonstrating their comfortable and lightweight design. The image highlights the high elasticity of the ear clip, suitable for various ear sizes.
6. Operating Controls
The Monster Open AC601 earbuds feature smart touch controls for easy management of audio and calls.

Figure 6.1: A visual guide to the touch controls on the Monster Open AC601 earbuds, detailing single, double, and triple taps for functions like answering calls, playing/pausing music, skipping tracks, and activating the voice assistant.
- Answer/End Call: Double-tap L/R earbud.
- Play/Pause: Double-tap L/R earbud.
- Decline Phone Call: Triple-tap L/R earbud.
- Previous Song: Triple-tap L earbud.
- Next Song: Triple-tap R earbud.
- Increase Volume: Single-tap R earbud.
- Reduce Volume: Single-tap L earbud.
- Voice Assistant: Press and hold L/R earbud for 2 seconds.
6.1. Environmental Noise Cancellation (ENC)
The earbuds feature ENC technology to reduce background noise during calls, ensuring clear conversations.

Figure 6.2: A woman wearing the Monster Open AC601 earbuds, illustrating the ENC Call Noise Reduction feature for clear calls in various environments.
7. Charging
The earbuds and charging case provide a total of 32 hours of playtime. The earbuds offer approximately 8 hours of listening time on a single charge, and the charging case provides additional charges.
- Earbuds Charging: Place the earbuds into the charging case. They will begin charging automatically.
- Case Charging: Connect the USB charging cable to the charging port on the case and a power adapter. A full charge for the case takes approximately 1 hour.

Figure 7.1: Image displaying the Monster Open AC601 earbuds and their charging case, highlighting the total playtime of 32 hours. It also indicates 8 hours of playtime for the earbuds and 1 hour fast charging for the case.
8. Maintenance
8.1. Cleaning
Regularly clean your earbuds and charging case to ensure optimal performance and hygiene.
- Use a soft, dry, lint-free cloth to wipe the earbuds and charging case.
- Do not use abrasive cleaners, solvents, or aerosol sprays.
- Avoid getting moisture in any openings.
8.2. Storage
When not in use, store the earbuds in their charging case to protect them and keep them charged.
8.3. Water Resistance
The earbuds are IPX5 waterproof, meaning they are protected against low-pressure water jets from any direction. This makes them suitable for use during workouts or in light rain. Do not submerge them in water.

Figure 8.1: A man exercising, wearing the Monster Open AC601 earbuds, demonstrating their IPX5 waterproof rating and silicone material which effectively blocks sweat and light rain.
9. Troubleshooting
If you encounter issues with your Monster Open AC601 earbuds, try the following solutions:
- No Sound: Ensure earbuds are charged and properly paired. Check device volume.
- Cannot Pair: Make sure Bluetooth is enabled on your device and the earbuds are in pairing mode. Try turning Bluetooth off and on again on your device.
- Intermittent Connection: Ensure earbuds are within range of your device (typically 10 meters/33 feet). Avoid obstacles that may interfere with the Bluetooth signal.
- Earbuds Not Charging: Check if the charging cable is securely connected and the power source is active. Ensure the charging contacts on the earbuds and case are clean.
- Poor Call Quality: Ensure the earbuds are positioned correctly. Environmental Noise Cancellation (ENC) should help, but extreme noise may still affect clarity.
10. Specifications
| Feature | Detail |
|---|---|
| Model Number | AC601 |
| Bluetooth Version | 5.4 |
| Control Method | Touch |
| Ear Placement | Open Ear (Clip-On) |
| Noise Control | Environmental Noise Cancellation (ENC) |
| Total Playtime | Up to 32 hours (with charging case) |
| Earbud Playtime | Approx. 8 hours |
| Waterproof Rating | IPX5 |
| Item Weight | 5.3 ounces (0.15 Kilograms) |
| Manufacturer | Monster |
11. Safety Information
- Do not expose earbuds to extreme temperatures or direct sunlight.
- Avoid listening at high volumes for extended periods to prevent hearing damage.
- Do not use earbuds while driving or in situations where you need to hear your surroundings.
- Keep out of reach of children and pets.
12. Warranty and Support
For warranty information and customer support, please refer to the official Monster website or contact your retailer. Keep your purchase receipt as proof of purchase.





