7 khz polycom hd voice for remarkable clarity and intelligibility 7 foot 2 1 meter microphone pickup range resists interference from mobile phones and other wireless devices high resolution backlit display for vital call information and multi language support integrated power over ethernet po e connectivity 7 khz polycom hd voice for remarkable clarity and intelligibility 7 foot 2 1 meter microphone pickup range resists interference from mobile phones and other wireless devices high reso