Amplifier is designed for use with traditional or wideband VoIP phone systems, including SupraPlus, Encore, Tristar, DuoPro, Duoset, and Mirage headsets. VoIP-ready Vista M22 amplifier is compatible with most office phones. Clearline audio technology enhances speech clarity and helps to reduce repeats, errors, and listening fatigue. Easy-to-use amplifier offers a one-button headset/handset selection plus controls for both incoming and outgoing volume. When used with wideband VoIP system, the Vista...