1. Product Overview
The Maxell MXH-BTW401 True Wireless Earbuds are designed for comfort and convenience. Featuring a lightweight and compact design, they offer a secure fit that minimizes protrusion from the ear, making them suitable for use even while lying down. The stick-type charging case is slim and customizable, allowing users to personalize it with stickers.
These earbuds support Bluetooth 5.3 for stable connectivity, hands-free calling, and multi-pairing with up to four devices. Enjoy clear audio for music, calls, and web conferences.

Image: Maxell MXH-BTW401 earbud shown in a person's ear, emphasizing its lightweight design and comfortable fit. The text "Light weight" is visible.

Image: A person lying down comfortably, using the Maxell MXH-BTW401 earbuds. This illustrates the earbuds' design for minimal protrusion, allowing for use in various relaxed positions.
2. Package Contents
Ensure all items are present in the package:
- Maxell MXH-BTW401 True Wireless Earbuds (Left and Right)
- Charging Case
- Earpieces: 3 sizes (S, M, L), 2 pieces each. (M size is pre-installed on the earbuds)
- Charging Cable: USB-A to Type-C (approx. 45 cm)
- Instruction Manual (this document)

Image: A flat lay of the included accessories, showing the different sizes of earpieces and the USB-A to Type-C charging cable.
3. Setup and Charging
3.1 Initial Charging
- Place the earbuds into the charging case.
- Connect the provided USB-A to Type-C charging cable to the charging case and a USB power adapter (not included).
- The indicator light on the charging case will show charging status. A full charge for the case takes approximately 2 hours.
- The charging case can fully recharge the earbuds approximately 2 times.

Image: The Maxell MXH-BTW401 earbuds inside their stick-type charging case. The image highlights the battery life: 6.5 hours of continuous playback for the earbuds and up to 19.5 hours total with the charging case.
3.2 Pairing with a Device
- Open the charging case. The earbuds will automatically enter pairing mode.
- On your device (smartphone, tablet, etc.), enable Bluetooth and search for available devices.
- Select "MXH-BTW401" from the list of found devices to connect.
- Once connected, a confirmation sound will play from the earbuds.
Multi-pairing: The earbuds support multi-pairing with up to 4 devices. To switch between paired devices, simply connect from the desired device's Bluetooth settings.
4. Operating Instructions
4.1 Basic Controls (Touch Control)
The earbuds feature 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 Control: Press and hold the right earbud to increase volume, press and hold the left earbud to decrease volume.
Note: If the case is difficult to remove, twist it approximately 90 degrees until it detaches. If you experience accidental touches, ensure the earbuds are properly seated in your ear.
4.2 Single-Ear Mode
You can use either the left or right earbud independently. Simply remove one earbud from the charging case, and it will automatically connect to your paired device. The other earbud can remain in the case or be turned off.
4.3 Hands-Free Calling
The built-in microphone allows for clear hands-free calls and participation in web conferences. Ensure the earbuds are connected to your device via Bluetooth.

Image: A person using the earbuds for hands-free communication, with icons representing multiple devices (smartphone, tablet, laptop, desktop) to illustrate multi-device compatibility.
5. Customization (Sticker Application)
The transparent outer case of the charging case can be customized with stickers. This allows you to create a unique and personalized look for your earbuds.
Important: The thickness of the sticker must be 0.12mm or less to ensure the case closes properly.
- Twist the outer case approximately 90 degrees to separate it from the inner earbud holder.
- Apply your desired sticker(s) to the inner surface of the transparent outer case.
- Reattach the outer case by aligning and twisting it back into place.

Image: Three stick-type charging cases, each customized with different stickers, demonstrating the personalization feature.

Image: A step-by-step diagram illustrating how to remove the outer case, apply stickers, and reassemble the charging case for customization.
Video: A short demonstration showing how to apply stickers to the charging case and highlighting the lightweight design and hands-free calling features of the Maxell MXH-BTW401 earbuds.
6. Maintenance
- Cleaning: Regularly clean the earbuds and charging case with a soft, dry cloth. Do not use liquids or abrasive cleaners.
- Earpieces: Remove earpieces and clean them with a damp cloth if necessary. Ensure they are completely dry before reattaching.
- Storage: When not in use, store the earbuds in their charging case to protect them and keep them charged.
- Water Exposure: These earbuds are not waterproof. Avoid exposure to water, moisture, or excessive humidity.
7. Troubleshooting
- No Sound:
- Ensure earbuds are charged.
- Check if Bluetooth is enabled on your device and connected to "MXH-BTW401".
- Adjust the volume on both your device and the earbuds.
- Cannot Pair:
- Ensure earbuds are in pairing mode (indicator light flashing).
- Turn off and on Bluetooth on your device.
- Try resetting the earbuds (refer to the full manual for specific reset instructions if needed).
- Earbuds not charging:
- Ensure the charging cable is securely connected to both the case and the power source.
- Check if the charging contacts on the earbuds and inside the case are clean.
- Accidental Touch Controls:
- Ensure the earbuds are properly seated in your ears.
- Avoid touching the touch-sensitive area unnecessarily when adjusting the earbuds.
For further assistance, please refer to the full product manual or contact Maxell customer support.
8. Specifications
| Model | MXH-BTW401 |
| Type | Closed Dynamic |
| Driver Unit | Diameter 6mm |
| Frequency Response | 20 - 20,000 Hz |
| Power Source | Built-in rechargeable lithium-ion battery |
| Continuous Playback Time (Earbuds) | Approx. 6.5 hours |
| Continuous Standby Time | Approx. 70 hours |
| Charging Time (Case) | Approx. 2 hours |
| Earbud Weight (each) | Approx. 3.3g |
| Charging Case Weight | Approx. 35g |
| Multi-pairing | Up to 4 devices |
| Wireless Type | Bluetooth 5.3 |
| Waterproof | No |
| Country of Origin | China |

Image: An exploded diagram of the earbud, illustrating its internal components, including the 6mm driver for clear sound quality.
9. Warranty and Support
The Maxell MXH-BTW401 True Wireless Earbuds come with a 1-year manufacturer's warranty from the date of purchase.
For warranty claims, technical support, or any inquiries regarding your product, please contact Maxell customer service. Keep your proof of purchase for warranty validation.
Please visit the official Maxell website for the most up-to-date support information and contact details.





