next audiocom X4 User manual
Wireless Headphones
v202102
www.nextaudiocom.com
USER MANUAL
X4 Headphones Micro USB
Charging Cable
USER MANUAL
User Manual 3.5mm Jack
Audio Cable
PACKAGING CONTENTS
Protective Bag
X4 OVERVIEW
POWER ON
Long press the power switch for 3 seconds, the
LED lights up blue and then alternatively ashes
blue and red which means it is on pairing mode.
BLUETOOTH CONNECTION
1. Ensure the X4 is turned on, and the LED
indicator is ashing blue and red. This indicates
the X4 is ready to pair.
2. Turn on the Bluetooth on your mobile device
and search for devices to pair.
3. Click “NEXT X4” to pair with your X4
headphones.
NOTE: Only one device can be paired at a time.
4. The LED turns solid blue, when a successful
connection is completed.
5. The headphones will automatically connect to
the last paired device if near each other.
UNPAIR BLUETOOTH DEVICE
Long press the power switch for 5 to 6 seconds.
The headphones will power o and the LED will
light blue. The headphones are now unpaired.
ANSWERING INCOMING CALLS
Short press the power switch to answer
incoming calls.
END CURRENT CALL
Press the power switch once to end the current
call.
REJECT INCOMING CALL
Press the power switch for around 1 second,
when there is an incoming call, to reject it.
LAST NUMBER REDIAL
Double press the power switch to redial the last
called number.
POWER OFF
Long press the power switch for 3 seconds to
turn the device o.
MUSIC REPRODUCTION
1. Play / Pause: Short press the power switch.
2. Previous Track: Long press - button to select
the previous song.
3. Next Track: Long press + button to select the
next song.
4. Increase Volume: Short press + button to
increase the volume level (There will be a
prompt when the maximum volume is reached).
5. Decrease Volume: Short press - button to
decrease the volume level.
AUX MODE - 3.5MM JACK
1. Plug and play: Connect the X4 to an audio
player using the provided 3.5mm audio cable.
The headphones can be used while turned o. It
is compatible with several dierent devices.
MICRO SD MODE
Insert a micro SD card, press the MFB button to
select the micro SD mode, and the playback of
MP3 les starts automatically.The size of the card
is limited to 32GB.
FM RADIO MODE
1. Short press the MFB button to change to FM
mode, then press the power switch to scan and
memorize the FM radio stations.
2. Long press + or - buttons to select the desired
radio station. Short press the + or - buttons to
increase or decrease the volume level.
CHARGING THE HEADPHONES
1. As the headphone has a built-in, non-remov-
able and rechargeable battery, please use the
provided micro USB cable to charge it.
2. The charging voltage and current is 5V/1A.
Please charge the X4 with an input power equal
or below 5W (1A).
3. Fully charge the headphones before the rst
use. It takes around two and half hours to charge
for the subsequent use.
4. During charging, the LED lights up red, and
goes o upon charging is completed.
5. The battery performance may decrease with
increasing number of charging cycles and
natural battery aging.
TECHNICAL SPECIFICATIONS
FR Driver: 40mm Full-Range Driver
Frequency Response: 20Hz - 20kHz
Bluetooth Tech: v5.0 - A2DP/AVRCP/HSP/HFP
Bluetooth Range: 10m
Audio Inputs: Stereo Bluetooth, 3.5mm Stereo
Jack, Micro SD Card, FM Radio
Battery Type: 400mAh (Lithium-ion)
Battery Play Time: Up to 18 Hours
Battery Charge Time: 2.5 Hours
Standby Time: Up to 600 Hours
Charging Voltage/Current: DC 5V/1A
Dimensions (WxHxD): 199 x 176 x 50mm
Net weight: 186g
CORRECT DISPOSAL
When the X4 is to be denitively discarded, take
the product to a local recycling plant for a
disposal which is not harmful to the
environment. This equipment should not be
treated as general household waste. Devices
marked with this symbol must not be disposed
of as household waste. For more information,
please contact your retailer or local authorities.
WARNINGS
1. Please follow these instructions before use.
2. Please charge the headphones with a 5V/1A
DC charger. Other chargers may damage the
headphones.
3. Please store or use the headphones in a
normal temperature environment (5ºC to 25ºC).
4. Please keep the headphones away from heat
sources, such as radiators, hot air regulators,
stoves, or other heat generating instruments.
5. Do not jam the in/out headphone ports, such
as charger, microphone and audio jack.
6. In order to protect your hearing and extend
the headphones service life, it is not
recommended to adjust the volume to the
maximum level for a long period of time.
7. If the equipment is not functioning properly or
has been damaged in any way, switch it o
immediately.
8. Do not open or try to service the equipment. It
may only be repaired by authorized, qualied
personnel.
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