Wired Remote Access Microphone RAM4Standard Horizon's wired remote access microphone RAM4 for Standard's GX1800, GX1800G, GX1850, GX1850G, GX2400, GX6000.Features: Controls all radio functions of the main station radio*; Operate up to 2 RAM4 wired remote stations; Submersible IPX8 waterproof rating (1.5 M or 4.92 feet for 30 minutes); Intercom feature allows you to communicate between the radio, RAM4 and Wireless RAM4W microphones; Full AIS target display; Perform all DSC functions: Individual calling, group calling, Position polling and more; Larger high resolution easy to read display with bright backlight; Rotary channel and volume controls; Programmable hot keys for quick menu access; 23' routing cable included; 3 Year Waterproof Warranty; *The SSM-70H is not backwards compatible with other Standard Horizon Models - cis2:mm5mnJlm -Specifications: Type: Microphones; Box Dimensions: 4"H x 8"W x 10"L WT: 2.4 lbs; UPC: 788026149018;