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Function

Button 

Sound (Speakers)

Status Indicator

Call Transfer (from 
earphones to mobile 
phone and vice versa)

Volume Up + double-click

“Beep” tone once (from earphones to 
mobile phone and vice versa)

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Volume Adjustment

Press +/- buttons once to 
increase / decrease the volume 
by one level during call (8 
levels in total)

 Beep for maximum and minimum levels

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The blue light blinks once every 5 seconds 

On-hold mode without 
mobile connection 
(no network within 
the range)

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The blue light blinks once every 5 seconds 

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