The Telex PH-88R is a lightweight, single sided headset offering solid performance and longwearing comfort. It features a high quality monaural dynamic earphone with a dynamic noise-canceling microphone on an adjustable boom that can be bent to practically any mouth-to-mic position. This unit has a straight cord with an XLR-4M connector. Receiver Type: Dynamic Receiver Impedance: 300 ohms Microphone Type: Dynamic Microphone Impedance: 200 ohms Connector: XLR-4M Weight: 4.6 oz Cord: 6 ft. straight