Standard Horizon SSM-517A Earpiece Microphone f/HX270, HX370, HX471 & HX400

The Standard Horizon SSM-517A Earpiece Microphone is a hands-free communication accessory engineered for maritime and field radio operators who need reliable two-way connectivity while maintaining situational awareness. This compact earpiece-microphone assembly integrates a high-sensitivity microphone with a comfortable earpiece design, allowing operators to transmit and receive on Standard Horizon HX-series handhelds without holding the radio to their ear. The SSM-517A is specifically compatible with the HX270, HX370, HX471, and HX400 models—popular choices for commercial fishing, vessel operations, rescue coordination, and remote field communications where dual-hand availability is critical.

The earpiece provides consistent audio clarity in demanding environments where background noise and weather conditions test communication reliability. The microphone element captures operator voice transmissions even during movement or while performing other tasks, eliminating the need to bring the radio to mouth level. The assembly's compact 3 x 1 x 4 inch form factor and lightweight 0.15 lb design make it practical for extended wear during long shifts aboard vessels, in vehicle cabs, or across job sites. This accessory transforms a handheld radio into a true hands-free system, allowing operators to maintain grip on steering wheels, fishing equipment, or emergency gear while maintaining immediate radio contact.

The SSM-517A is essential for professionals operating Standard Horizon HX-series radios in maritime, industrial, or remote communication scenarios where split attention between navigation, equipment operation, and communications is unavoidable. Fishing vessel crews, offshore operators, land-based emergency response teams, and utility workers all benefit from the hands-free flexibility this accessory provides. If your workflow demands continuous radio availability without compromising operational focus, a compatible earpiece-microphone assembly is a straightforward equipment upgrade that delivers practical value in the field.