The Sordin Supreme Mil AUX ARC Rail Sand Hearing Protector delivers combat-ready electronic noise attenuation alongside high-fidelity ambient amplification natively configured for integrated helmet deployment. Tested rigorously against stringent MIL-STD-810H and MIL-STD-461G military protocols, its high-grade internal circuitry incorporates robust Radio Frequency Interference (RFI) shielding to prevent transmission buzzing or distortion during proximity tactical jamming. The pre-installed, factory-engineered ARC rail adapters clip directly into standard tactical helmet side-rails, allowing operators to seamlessly pivot the ear cups open for cooling breaks or snap them tight for an absolute acoustic seal. An integrated 3.5mm AUX input port routes external radio communications down into fail-safe dual internal speakers per cup, ensuring vital team voice transmissions remain active even if the headset batteries completely drain. Featuring low-profile Sand tan slim cups to preserve a clean weapon cheek weld, this fully waterproof, IP67-rated headset operates reliably for up to 400 hours on two standard AAA batteries. Sordin Supreme Mil CC ARC Rail Nexus (TP120) Helmet Adapter Sand Hearing Protector 72308-05-S