NO Sound
The built-in battery is dead.
The MB402 is not linked
with the cell phone.
Volume set too low.
Recharge the battery.
Go through “Speaker
Operations” process to link
the speaker.
Increase the volume of
your device.
No audio signal via
the Bluetooth
connection
Speaker is not paired to
the audio source.
Volume too low
Increase the volume on
the audio source.
Increase the volume
on the speaker
Check whether a
connection exists.
If necessary, pair the
speaker again to the
audio source.
Speaker cannot be
connected
Pairing does not work
Check whether the audio
source supports the A2DP
protocol
Audio source
is switched off
Switch on the audio source
Bluetooth is switched off
at the audio source.
Switch on the Bluetooth
function in the audio source.
Use a different playback unit.
Bluetooth version is not
supported.
Poor sound quality from a
Bluetooth® device
Bluetooth device is almost
out of range of the MB402
Move your Bluetooth device
closer to the MB402
Battery capacity (included): 1600 mAH
Charging Voltage: DC 5V, 500mA and up
Max Play Time: 4 Hours
Working Temperature: -5
℃~+
40
℃
Working Humidity
：
0%~80%
The right to make technical and design modifications in the course of
Continuous product development remains reserved.
2
SPECIFICATIONS
TROUBLESHOOTING GUIDE/SPECIFICATIONS
Summary of Contents for MB402-AU
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