Jabra GN2000 IP Duo, NC, Wired, 150 - 6800 Hz, Office/Call center, 2.96 oz (84 g), Headset, Black Jabra GN2000 IP Duo, NC. Product type: Headset. Connectivity technology: Wired, Bluetooth. Recommended usage: Office/Call center. Headphone frequency: 150 - 6800 Hz. Weight: 2.96 oz (84 g). Product color: Black