Headset Amplifier and Interface Module
$64.99
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`- Provides headset interface for phone without a headset jack - Adjustable amplification of headset transmit and receive - Powered by 12V power supply (included) or 2 AA batteries (optional) - Headset On/Off button - Mute button - Headset volume control - In-use indicator LED - 3 RJ11 ports for headset, telephone handset, and telephone
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