The Titan ATEX Firecomm F4 is an intrinsically safe helmet communication unit designed for MSA F1, F1SF, and F2 firefighter helmets. The product combines a large on-helmet PTT button with a strong in-helmet audio system. The speaker clip enables easy, tool-free installation on the helmet, and the noise cancelling boom microphone along with Titan's high quality loudspeaker ensure clear and uninterrupted communication.