The speaker greatly improves the clarity and intelligibility of speech in a variety of applications and is suitable for use with most two-way radios as well as many other similar applications where background noise and interference give poor quality reception.
The power on/off switch removes power from the speaker and bypasses the audio. This allows the speaker to be used as a normal extension speaker without DSP. Even with this additional feature the price stays the same, offering even greater value for money.
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