Jabra Evolve 40, Wired, Office/Call center, 6.03 oz (171 g), Headset, Black Jabra Evolve 40. Product type: Headset. Connectivity technology: Wired, Bluetooth. Recommended usage: Office/Call center, Cable length: 47.2" (1.2 m). Weight: 6.03 oz (171 g). Product color: Black