Introduction
Thank you for choosing the chalvh B01 Wireless Earbuds. These earbuds are designed to provide a superior audio experience with advanced features for active lifestyles. This manual provides detailed instructions on how to set up, operate, and maintain your earbuds to ensure optimal performance.

Image: The chalvh B01 Wireless Earbuds displayed in their open charging case, showcasing the earhook design and digital battery display.
What's in the Box
- Wireless earbuds (Left and Right)
- Super portable charging case with LED power display
- USB-C fast charging cable
- User Manual

Image: An illustration showing the chalvh B01 earbuds, charging case, USB-C cable, and user manual, representing the package contents.
Setup
1. Charging the Earbuds and Case
Before first use, fully charge the earbuds and the charging case. Connect the provided USB-C cable to the charging port on the case and a power source. The LED digital display on the case will show the battery percentage of the case and the charging status of each earbud.
- Charging Time: Approximately 1.5 hours for a full charge.
- Playtime: Up to 10 hours on a single charge, with an additional 50 hours provided by the charging case.

Image: The chalvh B01 charging case open, showing the digital display indicating '100' for the case battery and charging bars for the left and right earbuds.
2. Pairing with Your Device
- Open the charging case. The earbuds will automatically enter pairing mode.
- On your device (smartphone, tablet, etc.), go to Bluetooth settings.
- Search for available devices and select "B01" from the list.
- Once connected, you will hear a confirmation tone, and the earbuds' indicator lights will change.
The earbuds utilize Bluetooth 5.4 technology for a stable and efficient connection, offering broader compatibility with devices supporting Bluetooth 5.3 or earlier versions.

Image: A smartphone displaying Bluetooth settings with "B01" selected, indicating successful pairing with the chalvh B01 earbud.
Operating Instructions
Wearing the Earbuds
The chalvh B01 earbuds feature an ergonomic earhook design for a secure and comfortable fit, especially during physical activities. Select the appropriate ear tip size (S/M/L) for optimal comfort and sound isolation.
- Choose suitable ear tips.
- Place the earbuds into your ear canal.
- Adjust the earhook to fit securely around your ear.

Image: A diagram illustrating the ergonomic design of the chalvh B01 earbud with earhooks and different ear tip sizes (S, M, L).
Smart Touch Controls
The earbuds are equipped with touch-sensitive controls on the outer surface. Refer to the table below for common functions:
| Action | Function |
|---|---|
| Tap L/R once | Play/Pause music, Answer/End call |
| Tap L/R twice | Next track (Right earbud), Previous track (Left earbud) |
| Tap L/R three times | Activate Voice Assistant (Siri, Google Assistant) |
| Press and hold L/R (2 seconds) | Volume Up (Right earbud), Volume Down (Left earbud) |
| Press and hold L/R (2 seconds) during call | Reject call |

Image: A visual guide demonstrating various touch control gestures on the chalvh B01 earbud for functions like play/pause, volume, calls, and voice assistant.
Maintenance
Cleaning
- Regularly clean the earbuds and charging case with a soft, dry, lint-free cloth.
- Remove ear tips and clean them with mild soap and water, then dry thoroughly before reattaching.
- Ensure charging contacts on both earbuds and case are clean and free of debris.
Storage
- Store the earbuds in their charging case when not in use to protect them and keep them charged.
- Avoid storing in extreme temperatures or high humidity.
Water Resistance
The earbuds are rated IPX7 waterproof, meaning they can withstand immersion in water up to 1 meter for 30 minutes. This makes them suitable for workouts and light rain. However, they are not recommended for swimming or prolonged water exposure. Ensure the earbuds are dry before placing them back in the charging case.

Image: An illustration showing the chalvh B01 earbuds being splashed with water, highlighting their IPX7 waterproof rating.
Troubleshooting
| Problem | Possible Solution |
|---|---|
| Earbuds not pairing | Ensure earbuds are charged. Turn off and on Bluetooth on your device. Forget "B01" from your device's Bluetooth list and re-pair. |
| Only one earbud working | Place both earbuds back in the case, close it, then open again. Ensure both earbuds are charged. Re-pair the earbuds. |
| Low volume or poor sound quality | Adjust volume on both earbuds and your connected device. Ensure ear tips are correctly sized and seated for a good seal. Clean ear tips and earbud grilles. |
| Earbuds not charging | Ensure charging cable is securely connected. Clean charging contacts on earbuds and case. Try a different USB-C cable or power adapter. |
| Intermittent connection | Ensure no obstacles between earbuds and device. Stay within the 15-meter Bluetooth range. Avoid strong electromagnetic interference. |
Specifications
- Model Name: B01
- Brand: chalvh
- Connectivity Technology: Wireless (Bluetooth 5.4)
- Bluetooth Range: 15 Meters
- Noise Control: Sound Isolation, CVC 8.0 Noise Cancellation
- Audio Driver Type: Dynamic Driver
- Audio Driver Size: 13 Millimeters
- Frequency Response: 20 KHz (Note: This is likely a typo and should be 20Hz-20kHz)
- Sensitivity: 35 dB
- Battery Life: 10 hours (earbuds), 50 hours (with charging case)
- Charging Time: 1.5 Hours
- Water Resistance Level: IPX7 Waterproof
- Control Type: Touch Control
- Ear Placement: In Ear (with Earhooks)
- Material: Plastic
- Item Weight: 8.8g per earbud, 0.15 Kilograms (total package weight)
- Product Dimensions: 2.36 x 1.57 x 1.18 inches (charging case)
Warranty and Support
For warranty information and customer support, please refer to the documentation included in your product packaging or visit the official chalvh website. Keep your purchase receipt for warranty claims.