Motorola GMMN4585 Savox HC-1 Helmet-Mounted Headset

The Motorola GMMN4585 (also known as GMMN4585A) is a Motorola-branded Savox HC-1 helmet-mounted headset designed for firefighters, rescue teams, and industrial professionals working in extremely noisy conditions. It features a bone-conduction microphone that captures speech through skull vibrations, ensuring clear voice transmission even when wearing breathing apparatus, face masks, or full protective gear.

Unlike the dual-speaker HC-2 model, the GMMN4585 uses a single-ear speaker, allowing users to maintain situational awareness while receiving critical radio communications. The headset mounts easily inside most professional helmets without tools and connects to compatible push-to-talk units via a 4-pole Nexus quick-release connector.