Standard Horizon SSM-21A Speaker Mic f/HX890, HX400, HX400IS, HX380, HX40 HX210 [SSM-21A] Marine Navigation & Instruments | GPS - Fishfinder Combos This PLUS model also has

This PLUS model also has a NMEA 2000 interface (with integral drop cable) so that it can integrate with modern plotters

Tin-plated copper alloy conductors

Professional Series Battery Charger - 45A - 3-15A-Banks - 12V-36V

As the ELITE model in the Chirp In-Hull product line

Standard Horizon SSM-21A Speaker Mic f/HX890, HX400, HX400IS, HX380, HX40 HX210 [SSM-21A] Marine Navigation & Instruments | GPS - Fishfinder Combos This PLUS model also hasSSM 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. Specifications: Type: Microphones Box Dimensions: 3"H x 5"W x 7"L WT: 0. 45 lbs UPC: 788026174768