20 Most Recent Sennheiser HDR 140 Consumer Headphones Questions & Answers


It is most likely just to let you know it has turned on.

Sennheiser HDR... | Answered on Sep 15, 2016


Turning the transmitter on and off (Fig. 5)
Turn on the sound source. This automatically activates the
transmitter and the green LED “ON/OFF” lights up. If the sound
source is turned off, the transmitter is automatically deactivated
after approx. 3 minutes (the LED “ON/OFF” goes off).
Note: The automatic level control only functions if the volume of the
sound source is sufficient.

Sennheiser HDR... | Answered on Feb 09, 2013

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