The Plantronics MS250 commercial aviation headset leverages a proven design to set new standards in comfort and reliability for pilots. The noise-canceling microphone enables clear, uninterrupted communications between pilot and air traffic control. The monaural over-the-head design offers a stable fit for extended wear. MS250 Features: Clear voice transmission between commercial pilots and air traffic control. Hear and be heard with superior audio quality and noise-canceling microphone. Over-the-head design delivers all-day wearing comfort. Monaural designs. Conveniently portable and easily stowed due to compact design. FAA approved. MS250 Details: Length of Cable: 5.75 ft (1.8 M) Connectors: Microphone: Molded, PJ068 or equivalent Receiver: Molded, PJ055 or equivalent Receiver Type: Dynamic Impedance: 600 ohms Sensitivity: 90 dBSPL with an input of 1mW @ 1KHz Frequency Response: 100-5000 Hz Microphone and Amplifier: Type: Noise canceling electret microphone with amplifier Frequency Response: 300 to 5000 Hz Sensitivity: -28 dBV into 150 ohms with an input of 94 dBSPL @ 1kHz Supply Voltage: 8-16 V dc Gross Weight: (Headset only) 1.95 oz (55.4 g) Gross Weight: (w/cable) 4 oz (115 g) The clear choice in lightweight commercial aviation headsets. Chances are, if you re a commercial pilot, you often wear a Plantronics headset when you fly. That s because Plantronics has been supplying headsets to pilots for more than 40 years. In fact, Plantronics was the first to introduce a lightweight commercial aviation headset back in 1962. Known for superior sound quality and lightweight designs, a Plantronics headset offers quality you can trust a fact born out of the FAA s selection of Plantronics as their sole supplier of headsets for air traffic control.