TCIV-2+ Turbine Compact IP Video-2+The TCIV 2+ station utilize the latest technology to create unparalleled audio quality. Some of the many features include: HD voice quality, Open Duplex, noise and acoustic echo cancellation, MEMS microphone, a 10W Class D amplifier and our unique speaker grille design. These features, in conjunction with the company's 70+ years of experience with acoustic technology, are just a few of the many factors that contribute to our superior audio quality.