For sale are some New David Clark headsets, model H3430. This headset is designed to work with the David Clark 3800 series vehicle intercom. These are over-the-head (OTH) style using efficient noise-canceling M-7A amplified electret microphones mounted on flex-wire boom for easy "one touch" use. The boom rotates for either left or right placement. These headsets come with Comfort-Gel ear seals for maximum comfort. The H3430 headset is equiped with a 36" straight cord with a common communication plug. These headsets have a 23dB noise reduction rating.