The EdSets Boom Microphone sets a high standard for speech quality and noise rejection thanks to it's dual-ported design. These ports allow ambient sound to strike both sides of the mic diaphram simultaneously, thereby effectively cancelling out the ambients. Windscreens reduce wind buffeting overpressures to reduce percieved wind noise. New stainless steel substructure is virtually indestructable in normal use and is lightweight, reducing transmitted vibrations that can be amplified by the mic element. Mounts with 3M Dual Lock, a strong reclosable fastner that lasts for years of continued use. The mounting base is only 6mm thick including the Dual Lock, and only occupies 1 square inch of surface space inside the helmet. The base mounts between the cheekpad and outer shell of the helmet and is designed to exit the helmet between these two components. The inside mount makes a clean trouble free installation that does not interfere with the good looks and operation of your helmet, nor does it mar the finish and possibly damage the structure of your helmet like clamps and screws can.