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The Sennheiser RS 120 is an RF wireless headphone system with open, supra-aural headphones.

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Battery replacement of transmitter

Hi there,

How to replace battery in transmitter base.

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Hi @naroo51,

Looking at the user guide for the headphones indicates that the transmitter requires to be connected to the mains with an 100-240V AC / 9VDC 0.34A adapter (see image of adapter - click on image to enlarge for better viewing) and that there appears to be no batteries located in the base unit.

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The only batteries are the 2 x AAA NiMH rechargeable ones found in the headphones.

What is the problem with your headphones/ transmitter?

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P Naroo will be eternally grateful.
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