The GN Netcom noise-canceling Duo Headset is a professional contact center or office headset that supports a busy and noisy work environment. It supports your IP telephony applications. For best results please use a GN amplifier. Noise-canceling duo headset intended for busy loud call centers or offices. Rich wideband sound range of 150-6800 Hz. Flex boom. PeakStop technology. Supports IP telephony applications. Best results when used with a GN amplifier.