Introduction
This manual provides instructions for the Monster Open AC601 Wireless Earbuds. Please read this manual thoroughly before using the product to ensure proper operation and to maintain the device effectively. Keep this manual for future reference.
Package Contents
- Monster Open AC601 Wireless Earbuds (Left and Right)
- Charging Case
- USB-C Charging Cable (not explicitly listed but standard)
- User Manual (this document)
Product Overview
The Monster Open AC601 Wireless Earbuds are designed for open-ear listening, allowing awareness of surroundings while enjoying audio. They feature Bluetooth 5.4 connectivity, Environmental Noise Cancellation (ENC) for calls, and touch controls.

Image: Monster Open AC601 Wireless Earbuds and Charging Case. This image displays the earbuds and their charging case, providing a general view of the product.
Setup
1. Charging the Earbuds and Case
Before first use, fully charge the earbuds and the charging case. Connect the provided USB-C charging cable to the charging port on the case and to a power source. The charging indicator lights on the case will show the charging status. A full charge for the case provides up to 32 hours of additional playtime, while the earbuds themselves offer up to 8 hours on a single charge.

Image: Earbuds and charging case with 32H playtime indicator. This image illustrates the total battery life of 32 hours when combined with the charging case, and 8 hours for the earbuds alone, with a 1-hour fast charging capability.
2. Pairing with a Bluetooth Device
- Ensure the earbuds are charged and placed in the charging case.
- Open the charging case. The earbuds will automatically enter pairing mode, indicated by a flashing light (refer to LED indicator section for specific patterns).
- On your device (smartphone, tablet, etc.), go to the Bluetooth settings.
- Search for available devices and select "Monster AC601" 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.
The earbuds feature Bluetooth 5.4 technology for a stable and efficient connection.

Image: Bluetooth 5.4 technology diagram. This image highlights the upgraded Bluetooth 5.4 technology, emphasizing its stable connection and increased transmission rate compared to Bluetooth 5.0.
Operating Instructions
1. Wearing the Earbuds
The Monster Open AC601 earbuds are designed with a secure clip-on mechanism for comfortable and stable wear. Gently clip each earbud onto your ear, ensuring the speaker is positioned correctly for optimal sound delivery while maintaining an open-ear design.

Image: Comfortable wearing design of earbuds. This image illustrates the high elasticity and lightweight nature of the earbuds, contributing to a comfortable wearing experience.
2. Touch Controls
The earbuds feature smart touch controls for various functions:
- Play/Pause: Single tap on either earbud.
- Next Track: Double tap on the right earbud.
- Previous Track: Double tap on the left earbud.
- Answer/End Call: Single tap on either earbud during an incoming call.
- Reject Call: Press and hold either earbud for 2 seconds during an incoming call.
- Activate Voice Assistant: Triple tap on either earbud.
- Volume Up: Press and hold the right earbud.
- Volume Down: Press and hold the left earbud.
3. Call Features
The earbuds incorporate Environmental Noise Cancellation (ENC) technology to reduce background noise during calls, providing clearer communication.

Image: ENC Call Noise Reduction feature. This image illustrates the Environmental Noise Cancellation technology, designed to provide clear calls by reducing ambient noise.
4. Sound Quality
Equipped with 13mm PVK composite sound film technology, these earbuds deliver rich, Hi-Fi audio with powerful bass and clear high frequencies.

Image: 13mm Speaker Dynamic Audio diagram. This image details the internal structure of the earbud, highlighting the 13mm speaker dynamic audio and acoustic cavity structure for enhanced sound quality.
Maintenance
1. Cleaning
- Regularly clean the earbuds and charging case with a soft, dry, lint-free cloth.
- Do not use abrasive cleaners, alcohol, or chemical solvents.
- Ensure charging contacts are free of dust and debris.
2. Water Resistance
The earbuds have an IPX5 water resistance rating, protecting them from sweat and light rain. They are not designed for submersion in water. Avoid exposing them to strong jets of water or swimming.

Image: IPX5 Waterproof feature. This image demonstrates the IPX5 waterproof rating, indicating protection against sweat and light rain.
3. Storage
When not in use, store the earbuds in their charging case to protect them and ensure they remain charged. Store in a cool, dry place away from extreme temperatures.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Earbuds do not power on. | Low battery. | Place earbuds in the charging case and charge fully. |
| Cannot pair with device. | Bluetooth is off; earbuds not in pairing mode; device too far. | Ensure Bluetooth is enabled on your device. Open the charging case to enter pairing mode. Move device closer to earbuds. Forget previous pairings and try again. |
| No sound or low volume. | Volume too low; earbuds not properly seated; connection issue. | Adjust volume on both earbuds and connected device. Ensure earbuds are worn correctly. Reconnect Bluetooth. |
| Muffled call audio. | Environmental interference; earbud positioning. | Move to a quieter environment. Adjust earbud position for optimal microphone pickup. |
| Touch controls unresponsive. | Temporary software glitch; dirty sensor. | Place earbuds back in the case, close, then reopen. Clean the touch sensor area. |
Specifications
- Brand: Monster
- Model Name: AC601
- Model Number: E62
- Color: White
- Ear Placement: Open Ear
- Noise Control: Environmental Noise Cancellation (ENC)
- Bluetooth Version: 5.4
- Audio Driver: 13mm Dynamic Driver (PVK composite sound film)
- Earbud Battery Life: Up to 8 hours
- Total Playtime (with Charging Case): Up to 32 hours
- Charging Port: USB-C
- Water Resistance Rating: IPX5
- Control Method: Touch
- Compatible Devices: Cellphones and other Bluetooth-enabled devices
Warranty and Support
For warranty information, please refer to the warranty card included with your purchase or visit the official Monster website. For technical support or customer service, please contact Monster customer support through their official channels.


