Lindero H21B True Wireless Earbuds User Manual
- June 6, 2024
- Lindero
Table of Contents
Lindero H21B True Wireless Earbuds User Manual
Product Structure Description
Picture only for reference!
Packing List
1 pair of earbuds, 1 charging case, 3 pairs of tips (size: S, L; M tips
already on the earbuds),
1 USB cable, 1 User Manual.
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Charging Case × 1
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Earbud x 2
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Eartips x 3
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USB cable x 1
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User Manual x 1
Use Instructions
Bluetooth pairing
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Method 1
Take out two earbuds, they will turn on and enter pairing mode automatically with orange and white indicator lights twinkling alternately; which enable the bluetooth of your phone to search “H21B” and then click it for pairing, it will be connected. -
Method 2
When the earbuds are turned on and not connected, press twice the left and right MFB to enter pairing mode with orange and white indicator lights twinkling alternately. Which enable the bluetooth of your phone to search “H21B” and then click it for pairing, it will be connected.
(Note: If the earbuds have been connected to device 1, please turn off the bluetooth function of device 1 and then try to pair with device 2.)
Power On
The earbuds will turn on automatically when taken out from the charging case, with orange and white light is on for 1s;
When the earbuds shut down, touch the MFB once, then the orange and white light is on for 1s to boot up.
Power Off
The earbuds will turn off automatically when put back into the charging case, with the orange light always on；
When the earbuds is on and out of the charging case, long press the left or right MFB for 3s, then the orange light is on for 1s, that means the earbuds shut down.
Use of MFB
Reset
When the earbuds are out of the charging case , long press the left and right MFB for 8s, and then double-tap the left and right MFB within 10s; the white light will flash quickly, a few seconds later the earbuds will re-enter the pairing mode.
HearThrough Mode
In standby state/music state:
You can capture surrounding sounds by turning on the HearThrough mode . When you want to pay attention to the environment or have a conversation, this function is very convenient.
Operation method: long press the right MFB for 2s to enter the HearThrough mode; switch in the order : HearThrough mode →HearThrough mode Off.
Common questions
- Q: Unable to connect to phone:
1. Ensure that the product has sufficient battery, has been turned on, and has been paired with the phone to establish connection.
2. The phone’ s Bluetooth activates.
3. Whether the distance between the product and the phone is more than 10 meters (about 30 feet), and whether there are walls, other obstacles or other electronic devices between them.
4. Please reset to factory settings and then re-pair.-
Q: No voice heard
Please try to turn up the phone’s volume. -
Q: Have noise
Bluetooth is a wireless technology, which means it is very sensitive to objects between the product and the device it is paired with. The design conditions for use are: the distance between the product and the matching device is no more than 10m, and there is no big obstacle (such as wall) between the two. Note: The sound effect may be affected in noisy outdoor environment.
Battery information
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This product is powered by rechargeable battery. New battery performs better after two or
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This product is powered by rechargeable battery. A new battery will performance better after two or three complete charge and discharge cycles. The battery can be charged and discharged repeatedly, but it will eventually fail.
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If this product is placed in a over hot or over cold place, such as in a closed car in summer or winter, the capacity and life of the battery will be reduced. It is recommended to store in 15℃ to 20℃ environments. It may not work in extreme cold or hot environment even if it is fully charged.
The battery’ s performance will be restricted when the temperature is far below freezing. -
Do not throw the battery into fire to prevent it from exploding. Damaged battery may also explode. Please follow the local regulations to deal with the battery. Please recycle the battery when possible, and do not dispose of it as household garbage.
Warm Tips: If this product is not used frequently, please regularly recharge and discharge it every three months, to avoid battery damage caused by unused for too long time.
FCC Statement
Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help
This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions:
- this device may not cause harmful interference, and
- this device must accept any interference received, including interference that may cause undesired operation.