A:AnswerYes, the active noise cancelling works when the headphones are plugged in.
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Yes, when the headphones are plugged into a cellphone they work for calls.
A:AnswerThis headphones are not supported by the Sennheiser application. Higher tier Sennheiser headphone do such as the Momentum series amongst others.
A:AnswerMost airplanes now provide the 3.5 mm jack for audio. The HD 4.5 provides the 3.5mm to 2.5mm so no extra adapter should be needed.
On older planes, if you want to be on the safe side, the dual 3.5 male to female 3.5 mm should be what you need.
A:AnswerPress and hold the power button it will say power on, keep holding the putt on. The led will alternate 2 different colors flashing. It is now in pairing mode. Look for the headphones in the Bluetooth menu that you are pairing with.
A:Answeras a default the outer speakers should not function while the bluetooth headphones are playing sound, however some devices do have resources and ability to share audio with multiple devices.
A:AnswerIt definitely seems to separate into Stereo. Not sure what "design" means either. I have an old "mono" and "stereo" CD of Beatles HARD DAY'S NIGHT Soundtrack that features all tracks. The headphones relay the Mono and the Stereo as intended.
