CRYSTAL BT4 On Ear Headphones User Manual
- June 6, 2024
- CRYSTAL
Table of Contents
CRYSTAL BT4 On Ear Headphones User Manual
Overview
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User Manual
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micro USB charging cable
NOTE
The earcups rotate in one direction only.
If they are forced to the opposite direction they could be damaged.
Charge it
- Use the micro USB cable which is included in the package of the headphones.
- A different micro USB cable might not be able to charge correctly (or even not at all) the battery of the headphones.
Connect:
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the micro USB plug into the headphone’s port.
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the USB plug into any compatible USB device.
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While battery is charging the indication light is red.
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When battery has been fully charged the light turns blue.
A full charge of the battery takes approximately 2 hours. -
The headphones are automatically deactivated during charging process.
Use it
Music
Calls
Connect it
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Long press (3 seconds) the On/Off button to activate (or deactivate) the headphones.
Once turned on, the headphones enter automatically into Pairing mode. -
The indication light is flashing red-blue, alternately
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Activate Bluetooth mode on your BT device.
Search for available devices and select CRYSTAL AUDIO BT4.
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The indication light turns blue, permanently.
Connection is successful.
- ! Please turn the headphones off when not in use in order to preserve battery life.
- ! The headphones will connect to the last paired device automatically as soon as you turn them on.
- ! The headphones will be automatically turned off if they are not connected to a device within 3 minutes.
WARRANTY
The product comes with a 1-year warranty starting from the purchase date. Warranty is valid only with the original proof of purchase (receipt or invoice). This warranty covers only the repair or replacement of the device and it is effective only in Greece.
DECLARATION OF CONFORMITY
Radio equipment and telecommunications terminal equipment, Directive
2014/53/EU Crystal Audio hereby declares that the product, BT4 Wireless
Headphones, is in conformity with provisions of the Directive 2014/53/ΕU. The
complete text of the Declaration of conformity can be found on the following
webpage: www.CrystalAudio.com
Technical Specifications
Bluetooth® Version: v5.0
Battery Capacity: 300mAh
Charge Time: ≈2 hours
Talk/Playback Time: up to 10 hours
AUX Cable Length: 120cm
USB Cable Length: 50cm
Drivers: 40mm
Sensitivity: 105dB ±3dB
Impedance: 64Ω
Freq. Response: 20Hz-20KHz
Weight: 140g
WARNING
- Using the headphones at a high volume for an extended period might lead to hearing damage.
- This product is not a toy. Keep out of reach of children.
- This product is not waterproof. It should be kept away from liquids and places of extreme humidity, rain, snow etc.
- Low battery may lead to “Poor” or “Lost” Bluetooth connection.
- Do not overcharge the battery of the device.
- Avoid exposing the product to excessive heat sources such as fire, candles, radiators, direct sunlight etc.
- This product should not be treated as household waste.
Please hand over to the applicable collection point for the recycling of electronic equipment.
Designed in Europe by Crystal Audio –
Assembled in China with the highest quality standards
The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG Inc. and any use of such marks by Crystal Audio is under license.
