David Clark model H3310 Noise Attenuating Headset.

• M—1/DC Noise Canceling Amplified Dynamic Microphone
• Noise Shielded Microphone (Muff) With Momentary PTT (Push to Talk) switch, can hang loosely or be secured over mouth with support straps.
• Soft Headpad and Ear Seals guarantee exceptional comfort.
• 30 inch straight cord with (PJ-051) Plug to meet with Series C31-XX Extension Cords.
• Corrosion proof, chrome plated Headset/Stirrup assembly.
• Certified Noise Reduction Rating of 26 DB