Standard SSM-64A Vox Headset

The Standard SSM-64A Vox Headset is a professional-grade communication accessory engineered for radio operators and tactical professionals who demand reliable hands-free operation in the field. This dual-function headset combines push-to-talk (PTT) capability with voice-activated transmission (VOX), enabling operators to maintain situational awareness while keeping both hands free for equipment handling or weapon manipulation. Designed specifically for Standard Horizon HX-series portable radios, the SSM-64A delivers consistent performance across multiple radio models including the HX370S, HX400, and HX851.

The headset features a sealed microphone cartridge and sturdy boom arm design that ensures clear audio transmission even in high-noise environments common to tactical operations and industrial use. VOX sensitivity is user-adjustable, allowing operators to fine-tune activation thresholds based on ambient noise levels and personal preference—critical for preventing false triggers in dynamic environments. The integrated PTT button provides manual override capability when VOX operation is unsuitable, and the lightweight construction at just 1 pound minimizes fatigue during extended wear. The compact form factor and standard compatibility with HX-series radios make this an industry-standard choice for emergency responders, security teams, and communications professionals.

This headset is ideal for users operating Standard Horizon HX370S, HX400, and HX851 portable radios in professional and field environments. While the SSM-64A is mechanically compatible with intrinsically safe (I.S.) radio variants such as the HX37SAS and HX400IS, users should note that pairing this non-I.S.-rated headset with those models will void the radio's I.S. certification—making it essential to verify compliance requirements before deployment. The rugged construction and proven track record across law enforcement, search and rescue, and commercial communications sectors make the Standard SSM-64A a dependable choice for mission-critical communications.