Introduction
Thank you for choosing the JVC Marshmallow Wireless Earbud Headphones, model HAFX35BTW. These headphones are designed to provide a comfortable and secure listening experience with wireless convenience. Featuring memory foam earpieces, a flexible neckband, and IPX4 water resistance, they are suitable for various activities. This manual provides essential information for setup, operation, maintenance, and troubleshooting to ensure optimal performance.
What's in the Box
- JVC Marshmallow Wireless Earbud Headphones (HAFX35BTW)
Note: Additional accessories such as charging cables or extra eartips may be included depending on the package. Please check your product packaging for a complete list.
Product Overview
The JVC HAFX35BTW headphones feature a lightweight design with a flexible neckband for comfortable wear. The earbuds are equipped with memory foam tips for a secure fit and enhanced sound isolation. An integrated 3-button remote and microphone allow for easy control of music playback, calls, and voice assistant functions.


Key Components:
- Earbuds: Equipped with memory foam eartips for comfort and sound isolation.
- Flexible Neckband: Designed for secure and comfortable wear around the neck.
- Control Unit: Houses the 3-button remote, microphone, and charging port.
- Magnetic Housing: Earbuds feature magnetic backs for tangle-free storage when not in use.

Setup
1. Charging the Headphones
Before first use, fully charge the headphones. Connect the charging cable (not explicitly listed as included, but implied) to the charging port on the control unit and to a USB power source. The LED indicator will show charging status. A full charge provides up to 8 hours of wireless listening.

2. Bluetooth Pairing
- Ensure the headphones are turned off.
- Press and hold the multi-function button (usually the center button on the remote) until the LED indicator flashes rapidly, indicating pairing mode.
- On your Bluetooth-enabled device (smartphone, tablet, etc.), go to the Bluetooth settings and turn Bluetooth on.
- Search for available devices. Select "JVC HAFX35BTW" or a similar name from the list.
- Once connected, the LED indicator on the headphones will change to a slow flash or solid blue, depending on the model.
- The headphones are now paired and ready for use.
Note: The Bluetooth range is approximately 10 meters (33 feet). Obstacles may reduce this range.
Operating Instructions
Power On/Off
- Power On: Press and hold the multi-function button until the LED indicator lights up.
- Power Off: Press and hold the multi-function button until the LED indicator turns off.
Music Playback
- Play/Pause: Press the multi-function button once.
- Volume Up: Press the '+' button.
- Volume Down: Press the '-' button.
- Next Track: Press and hold the '+' button.
- Previous Track: Press and hold the '-' button.
Phone Calls
- Answer/End Call: Press the multi-function button once.
- Reject Call: Press and hold the multi-function button.
- Redial Last Number: Double-press the multi-function button.
Voice Assistant
The headphones are compatible with voice assist functions on your connected device. To activate your device's voice assistant (e.g., Siri, Google Assistant), press the multi-function button twice quickly.
Comfort and Fit
The JVC Marshmallow Wireless Headphones are designed for a secure and comfortable fit, even during extended use. The flexible soft neckband rests gently around your neck, while the memory foam earpieces conform to the shape of your ear canal.
Memory Foam Earpieces
To achieve the best fit and sound quality, gently squeeze the memory foam eartips before inserting them into your ears. The foam will expand to create a seal, providing superior comfort and passive noise isolation.

Flexible Soft Neckband
The neckband is designed to be lightweight and flexible, minimizing discomfort. When not in use, the magnetic housing on the earbuds allows them to clip together, preventing tangles and making them easy to wear around your neck like a necklace.

Maintenance
Cleaning
- Wipe the headphones with a soft, dry cloth.
- Do not use harsh chemicals, cleaning solvents, or strong detergents.
- Regularly clean the eartips to prevent wax buildup, which can affect sound quality.
Water Resistance (IPX4)
The JVC HAFX35BTW headphones are rated IPX4, meaning they are resistant to splashing water from any direction. This makes them suitable for light rain or sweaty workouts. However, they are not designed for submersion in water. Avoid exposing them to heavy rain, showering, or swimming.
Storage
When not in use, store the headphones in a cool, dry place away from direct sunlight and extreme temperatures. Use the magnetic housing to keep the earbuds together and prevent tangling of the cord.
Troubleshooting
No Power
- Ensure the headphones are fully charged.
- Check the charging cable and power source.
Cannot Pair with Device
- Ensure Bluetooth is enabled on your device.
- Make sure the headphones are in pairing mode (LED flashing rapidly).
- Move the headphones closer to your device.
- Turn off and on both the headphones and your device, then try pairing again.
- If previously paired, try 'forgetting' the device on your phone's Bluetooth settings and re-pairing.
No Sound or Low Volume
- Check the volume levels on both the headphones and your connected device.
- Ensure the headphones are properly paired and connected.
- Clean the eartips and speaker grilles to remove any obstructions.
- Try playing audio from a different source or application.
Poor Sound Quality
- Ensure the eartips provide a good seal in your ears.
- Move closer to your connected device to avoid interference.
- Avoid using the headphones in areas with strong Wi-Fi or other wireless signals.
Specifications
| Feature | Detail |
|---|---|
| Model Name | HAFX35BTW |
| Connectivity Technology | Bluetooth |
| Wireless Communication Technology | Bluetooth |
| Bluetooth Version | 4.0 |
| Bluetooth Range | 10 Meters |
| Battery Life | 8 Hours |
| Water Resistance Level | Water Resistant (IPX4) |
| Control Type | 3-Button Remote (Play/Pause, Volume, Track, Call) |
| Microphone | Integrated |
| Earpiece Material | Memory Foam |
| Item Weight | 20 Grams (0.705 ounces) |
| Compatible Devices | Bluetooth-enabled devices |
| Special Feature | Android Phone Control, iOS Phone Control |
Warranty and Support
For warranty information and customer support, please refer to the documentation included with your product or visit the official JVC website. You can also visit the JVC Store on Amazon for more product details and contact options.





