Key Specifications/Special Features: Bidirectional noise suppression Compatible with PSTN Hyper-cardioid directional microphone With Hi-Fi audio amplifier and rare-earth neodymium magnet speaker With patented voice processing technology With handset and headphone functions Speaker volume: 80dB (maximum) Audio bandwidth range: 300 to 3,400Hz Network interfaces: PSTN and Skype Reverberation time:
