Qak Thump Z-W88 User Manual page 10

11. Why do unusual noises arise in the headphones?
Bluetooth device performance may be affected by any one of the following factors:

Whether your phone is within a strong-signal area or not. If it is within a
weak-signal area, the effects may be severe.

Whether the phone is within its effective distance or not.
12. What should I do if I cannot hear audio on my Thump very well?
Press the S5, "Volume+," on your Thump to increase its volume.
Adjust the volume button or press "Volume+" on your phone to increase its volume
and test if it is within a strong-signal area.
13. Why did my Thump stop working suddenly?
Battery power depleted. When battery is low, the red indicator will flash
accompanied with a double tone in the headphones.
14. Why do different phones have different answering requirements?
Different phone manufacturers use different Bluetooth software. .For example, for
some phones, you only need to press S4 gently to answer a call. However, for
others, you may need press S4 for 3 seconds to answer a call. Commonly, the
requirements to a call are to"press S4 gently" or "press S4 for 3 seconds."
Thump User Guide 9