Srhythm NiceComfort 75 Pro Manuel D'utilisation page 12

Voice Dialing
Press both "Volume Up" and "Volume Down"
buttons simultaneously to activate voice dialing
function(compatible with iPhone Siri and selected
Android voice dialing software).
How to Wear
90° inwards swivel of
earcups' holder
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Adjustable Headband
Airplane Adaptor Connection
Warning:
Only use for airplane,Can not be
plugged into the power socket
Connect the Airplane Adaptor
to audio socket(double holes)
of aircraft seat,use 3.5mm
audio cable to connect with
your headphone and Airplane
Adaptor.
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