Standard Horizon SSM-21A Speaker Mic f/HX890, HX400, HX400IS, HX380, HX40 & HX210 Hatch Lifts The RL-504 is one (1)

The RL-504 is one (1) part of a system based around 4 different heavy-duty anodized aluminum mounts that allow your device to attach to the ROKK Midi to unlock its incredible features

vinyl and even leather

When you use a Skylla-i or an MPPT with CAN bus in the system

MACH™ Series High Efficiency & Flexibility Engine Control Cable - Johnson/Evinrude/OMC - 32'

Standard Horizon SSM-21A Speaker Mic f/HX890, HX400, HX400IS, HX380, HX40 & HX210 Hatch Lifts The RL-504 is one (1)SSM 21A Speaker Mic for HX890, HX400, HX400IS, HX380, HX40 & HX210 Standard Horizon SSM 21A submersible speaker microphone with heavy duty belt clip. Compatible with Standard Horizon HX890, HX400, HX400IS, HX380, HX40, and HX210.