Boltune BT-BH021 True Wireless Stereo Earbuds User Guide

: June 7, 2024
: Boltune

Table of Contents

PACKAGE CONTENTS
PRODUCT DIAGRAM
HOW TO WEAR
USING YOUR EARBUDS
OPERATION AND FUNCTIONS
CLEANING AND MAINTENANCE
TROUBLESHOOTING
WARRANTY AND SERVICE
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

Boltune BT-BH021 True Wireless Stereo Earbuds

PACKAGE CONTENTS

(Fig. 1)

Boltune True Wireless Stereo Earbuds (BT-BH021)
6 x Ear Tips (two are equipped on the earbuds)
1 x USB-C Charging Cable
1 x User Manual
1 x Quick Start Guide

PRODUCT DIAGRAM

(Fig. 2)

Multifunction Touch Control
LED Indicator
Microphone
Charging Contacts
Charging Case
USB-C Charging Port
Charging Slot
Charging Indicator

Caution

• Do not expose this product to high temperatures.
• Do not immerse the earbuds into water or expose them to humidity for a
long time.
• Do not clean the product with detergent containing alcohol, ammonia,
benzene or abrasives.
• Avoid dropping.
• Place the earbuds back into the charging case when not in use and keep it
away from children and pets to avoid choking hazard.
• Unauthorized disassembly of any parts of this product is forbidden, which may cause fire hazard, warranty voidance, and/or property loss.
• Close attention is needed when using near children.
• Keep the charging case away from water, rain or any other liquid.
• Don’t use the product in thunderstorm to avoid malfunction or electric
shock.
• Always ask a professional technician or authorized personnel for repair.

| This product contains lithium battery. Never expose it to excessive heat such as direct sunlight or fire to avoid explosion.
---|---

HOW TO WEAR

Choose the Right Tips (Fig. 3)

Ear tips with different sizes are included in the package, try all sizes and
choose the ones fitting you best.

Wear the Earbuds (Fig. 4)
Please wear the earbuds as shown below.

Pictures only for reference.

Bluetooth Caution

When the device is connected wirelessly to another device, place the two devices close to each other to achieve their normal functionalities and avoid possible signal interference.
When using a wireless connection, make sure there are no obstacles between the two devices. Obstacles including walls and fences may shorten the effective range.

USING YOUR EARBUDS

Charging
Charging the Earbuds

Put the earbuds into the charging case as per the L (left) and R (right) marks (Fig. 5).
Cover the lid and charging will start automatically (Fig. 6).

Note:

Please fully charge the earbuds when using them for the first time.
When battery is low, a “Battery low” voice prompt will be heard (if you are wearing the earbuds). Please charge it in time or the earbuds will turn off automatically around 10 minutes later.
Charge the earbuds at least once every 3 months when not using for a long time.

Charging the Charging Case

Connect the charging port with any USB charging adapter or active computer USB port (Fig. 7).
The charging indicators will flash slowly.
Note: Unplug the charging cable (timely) when fully charged.

Power On (Fig. 8)
Uncover the lid and they will power on automatically.

Power Off (Fig. 9)
Put the earbuds into the charging case and close the lid, they will turn off automatically.

Pairing

You can use one earbud or both earbuds as per your preference. Please refer to the corresponding pairing instructions.
Before pairing, please turn off other Bluetooth devices and place the device to be connected close to the earbuds.
When the earbuds are disconnected from your device for more than 10 minutes, they will turn off automatically.

Couple Earbuds Mode

Uncover the lid to turn on the earbuds, they will connect with each other automatically. The LED indicators on both earbuds will flash blue and white alternately indicating the earbuds are in pairing mode now.
Turn on the Bluetooth function on your device and search for nearby devices. Find “Boltune BT-BH021” in the searching results, tap on the name to connect.
Once connected, the LED indicators on both earbuds will flash blue slowly.

Note:

It is not recommended to wear the two earbuds on different people. If needed, please keep the 2 earbuds within 3 meters / 9.8 feet in couple earbuds mode.

Single Earbud Mode

Take out one earbud from the charging case, and make sure the other one is placed in the charging case.
It will try to pair with the last paired device first then enter pairing mode with its LED indicator flashing blue and white alternately if pairing failed.
Turn on the Bluetooth function on your device and search for nearby devices. Find “Boltune BT-BH021” in the searching results, tap on the name to connect.
Once connected, the LED indicator will flash blue slowly.

Note:
If you want to change to couple mode, simply take out the other earbud
from the charging case, they will pair with each other automatically.

Clear Pairing List

If you failed to pair your device with the earbuds, please clear the pairing history as instructed below:

Place both earbuds in the charging case.
Press and hold the Multifunction Touch Control of the left earbud for 10 seconds until the LED indicator on both earbuds flash white three times.
If you have paired your device with the earbuds before, remove “Boltune BT-BH021” from the Bluetooth device list and pair again.
Re-pair with your Bluetooth® device as instructed in “Pairing” section.

Clear Pairing List
If you failed to pair your device with the earbuds, please clear the pairing
history as instructed below:

Place both earbuds in the charging case.
Press and hold the Multifunction Touch Control of the left earbud for 10 seconds until the LED indicator on both earbuds flash white three times.
If you have paired your device with the earbuds before, remove “Boltune BT-BH021” from the Bluetooth device list and pair again.
Re-pair with your Bluetooth® device as instructed in “Pairing” section.

Note:
If you want to pair the earbuds with another device when you have already paired them with a device, deactivate the Bluetooth function on the paired device or clear “Boltune BT-BH021” from its Bluetooth list. Restore the earbuds to factory settings as instructed above if pairing failed

OPERATION AND FUNCTIONS

Function	Operation	Voice Prompt

Play / Pause

| Tap the Touch Control on either of the earbuds twice|

/

CLEANING AND MAINTENANCE

Clean the earbuds and the charging case on a regular basis.
Use dry and soft cotton cloth to wipe the unit.
Note: Do not insert anything into the product.
Keep away from sharp objects to avoid scratches.
Put the unit in a dry and shady place if it is to be idle for a long time.
Do not clean the product with detergent or chemicals.

TROUBLESHOOTING

No.

| Problem|

Solution

---|---|---
1| Failed to turn on the earbuds| Earbuds low battery, please charge them
2| Failed to charge the earbuds|

Place the earbuds into the charging case properly
Make sure the charging case is fully charged

3| Can’t charge the charging case| Make sure the charging cable is intact and plugged in properly
4| Can’t find “Boltune BT-BH021” in the Bluetooth device list| The earbuds reconnected with previously paired device automatically:

Deactivate the Bluetooth function of previously paired device or clear “Boltune BT-BH021” from its Bluetooth device list, and then search again

5| Failed to pair the earbuds with your device|

Turn on the device and activate its Bluetooth function before pairing
Bring the earbuds into pairing mode as instructed in the “Pairing” section

6| No sound in one of the earbuds in couple earbuds mode| Place both earbuds back to the charging case then take them out, they will pair with each other automatically. If pairing failed, restore them back to the factory settings as instructed in the “Clear Pairing List” section
7| Poor sound quality|

Wear the earbuds properly and keep them close to each other.
Place the connected device close to the earbuds or remove the obstacles between them
Clear the debris on the earbuds

8| Unstable connection|

The effective distance may shorten with obstacles in the way
Turn off other Bluetooth devices to decrease the interference

9| Can’t hear the other party during a phone call| Set the volume to higher level

10

| The other party can’t hear your voice during a phone call| Free the built-in microphone of any covers
11| Touch Control of the earbuds is unresponsive| Place the two earbuds into the charging case and cover the lid, disconnect the Bluetooth connection. Uncover the lid to turn on the earbuds and pair again.

WARRANTY AND SERVICE

If any problems occur, please contact the Boltune Customer Care Centre in your country via the contact information listed in this User Guide.

The Bluetooth® word mark and logos are registered trademarks owned by the Bluetooth SIG, Inc. and any use of such marks by Sunvalleytek International Inc. is under license.

WEEE Compliance
Correct Disposal of This Product (Waste Electrical & Electronic Equipment)
(Applicable in countries with separate collection systems)
This marking on the product, accessories or literature indicates that the product and its electronic accessories should not be disposed of with other household waste at the end of their working life. To prevent possible harm to the environment or human health from uncontrolled waste disposal, please separate these items from other types of waste and recycle them responsibly to promote the sustainable reuse of material resources. Household users should contact either the retailer where they purchased this product, or their local government office, for details of where and how they can take these items for environmentally safe recycling. Business users should contact their supplier and check the terms and conditions of the purchase contract. This product and its electronic accessories should not be mixed with other commercial wastes for disposal.