The Clear-Com CC-40 is a single-ear enclosed general-purpose intercom headset featuring a leatherette ear pad and a flexible, dynamic neck microphone. It offers a durable design with comfort and excellent audio isolation. Fitted with a 4 Pin Female XLR connector.Clear-Com CC-40 Specifications:Single Ear HeadsetEnclosed Ear PhoneWeight: 265gLeatherette EarpadsDynamic MicrophoneImpedance Mic/Earpiece:200ohms/400ohms