This Jabra GN specialist headset cable has a 2.5mm jack plug one end and a GN Quick Disconnect plug on the other. It allows you to connect any GN headset terminating in a Quick Disconnect plug onto a wider range of office telephones, including all desktop corded telephones with a 2.5mm headset port and even DECT cordless phones with a 2.5mm headset port. The cable is discreet and durable and connects easily to your chosen telephone.