Sonova USA R21 Roger 21 - Audio and control signal transceiver User Manual user guide
Phonak LLC Roger 21 - Audio and control signal transceiver user guide
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R21 User Manual PDF Version
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<noframes>Roger 21 - Audio and control signal transceiver User Manual <br />Directly view this document at <a href="https://usermanual.wiki/Sonova-USA/R21-3397056.pdf">https://usermanual.wiki/Sonova-USA/R21-3397056.pdf</a> </noframes>
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