Shenzhen heng shang pin technology co. LTD B4 User Manual
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6.
HOW TO ADJUST VOLUME
During Music playing or voice calls, shortly tap the button “+” or “-” can
adjust voice volume.
Shortly tap “+” button for once, volume will increase a little, tap
continually can get the volume increased continually, you get the
highest voice when you hear a “BIP”.
highest voice when you hear a “BIP”.
Shortly tap “-” button for once,
volume will decrease a little, tap continually can get the volume decreased
continually, you get the lowest voice when you hear a “BIP” .
continually, you get the lowest voice when you hear a “BIP” .