FHS Over-The-Head Fire Safety Industrial HeadsetRUR FHS 22 The universal FHS 22 Fire Safety Headset by Rugged Radios. The most versatile and comfortable Over The Head Fire headset on the planet. Its universal design allows the FHS to work with almost any brand or type of fire intercom using our optional coil cords. Reversible headset design for right or left dress cord connection means the coil cord hangs from the preferred side of the body when connected, and is completely serviceable for the next