Crystal Acoustics NB2 User manual

User Manual
NB2
Neckband Earphones

Overview
1 pair of
Ear-fins
Instruction
manual
USER
MANUAL
micro USB
charging cable
Earbuds with 14mm drivers
for loud and clear bass
Remote with Control buttons
and integrated Microphone
Dual battery for
longer playtime
Charging port

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:
•the micro USB plug
into the headphone’s port.
• the USB plug
into any compatible USB device.
2h
• While battery is charging
the indication light is red.
A full charge of
the battery takes
approximately 2 hours.
• When battery has been
fully charged the light
turns blue.
The headphones are
automatically deactivated
during charging process.
red blue

Use it
Short press:
Increase volume
Long press (3s):
Next track
Short press:
Decrease volume
Long press (3s):
Previous track
Short press:
Play/Pause
Long press (3s):
Turn ON/OFF
Short press:
Increase volume
Short press:
Decrease volume
Short press:
Answer/End call
Long press (1s):
Reject call
Double Click:
Redial last
outgoing call
CallsMusic

• 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.
• The indication light
turns blue, permanently.
• Connection is successful.
4blue

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 any
kind of 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.
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.
Designed in Europe by Crystal Audio.
Assembled in China with the highest quality standards.
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.
www.CrystalAudio.com
Technical Specifications
Bluetooth Version:
Battery:
Charge Time:
Talk/Playback Time:
Cable Length:
USB Cable Length:
Drivers:
Sensitivity:
Impedance:
Freq. Response:
Weight:
v5.0
110mAh
≈ 2 hours
up to 10 hours
66cm
50cm
14mm
105dB ± 3dB
32Ω
20Hz-20KHz
18g
DECLARATION OF CONFORMITY
Radio equipment and telecommunications
terminal equipment, Directive 2014/53/EU
Crystal Audio hereby declares that the product, NB2 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