GN Netcom 9350 Wireless Office Headset for Desk and IP Phones Single headset for traditional and PC phone calls, up to 300 feet of office mobility WiFi-friendly 1.9 GHz frequency with DECT 6.0 wireless technology Noise-canceling microphone for reduced background noise Digital encryption for secure conversations, multi-unit conferencing capability Lightweight design and three wearing styles: headband, earhook and neckband