A typical public telephone operates within a bandwidth of 3.5 kHz, delivering a somewhat dull audio experience. In contrast, Commend’s ultra-high-definition voice raises the bandwidth to an astonishingly clear 20 kHz, allowing even music to resonate in all its beauty, making it ideal for public address systems and playbacks at stations. Combined with Intelligent Volume Control, Noise Cancelling, and OpenDuplex by Commend, even the most challenging environments are no problem anymore. Hear the difference!