Intelbras HSA 10 Manual Del Usuario página 16

ENGLISH
Headset Amplifi er
The HSA10 is an audio amplifi er that can be connected to the
operator telephone set in order to use a headset instead of
a handset for voice reception and transmission. The product
has adjstable audio transmission and reception volume, Mute
key, used to interrupt audio transmission and selection key for
handset or headset use.
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