Hertz HMA C3 5Y Marine Audio Accessory

The HMA C3.5Y is a short 3.5 mm jack Y-splitter — one male jack into two female jacks — for routing a phone or AUX-out signal to two destinations simultaneously. Common use: feeding a head-unit AUX input and a portable speaker from a single source, or sharing a headphone feed between two cabin positions. Marine-grade insulation tolerates damp install environments.