poly Aviation Headset, 90 dB (Receiver), 94 dB (Microphone), 600 Ohm (Receiver), 5.75 ft, 8 to 16 V

The Plantronics MS250 (monaural) commercial aviation headset leverage a proven design to set new standards in comfort and reliability for pilots. The noise canceling microphones enable clear, uninterrupted communications between pilot and air traffic control. The over the head design offers a stable fit for extended wear.
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
• Conveniently portable and easily stowed due to compact design
Specifications
• Series: MS250
• Sensitivity: 90 dB SPL with an Input of 1 mW at 1 kHz (Receiver), -28 dBV in to 150 Ohm with an Input of 94 dB SPL at 1 kHz (Microphone)
• Sound Pressure Level: 90 dB (Receiver), 94 dB (Microphone)
• Frequency Rating: 100 to 5000 Hz (Receiver), 300 to 5000 Hz (Microphone)
• Impedance: 600 Ohm (Receiver)
• Cord Length: 5.75 ft
• Supply Voltage: 8 to 16 V