Dimensions: 6.9″ W x 4.3″ H x 1.5″ D. Black. Radio control & intercom via your Smart Device (Use the RS-M500 app). Wide viewing angle color TFT LCD with night mode screen. Built-in Class D DSC and Distress Button. Built-in NMEA 2000. 15 watt speaker provides clear and loud audio. Simplified navigation function. MA-510TR compatible. Active noise canceling. Integrated GNSS receiver. IP68 advanced waterproofing (1m depth of water for 60 minutes). AquaQuake prevents audio degradation from a water-logged speaker. Supplied speaker-microphone (HM-205RB) can be connected to either the front or rear panel. External speaker connection. Supports 4-digit channels. Includes: Speaker Microphone (HM-205RB) Microphone Hanger Flush Mount Gasket DC Power Cable Mounting Bracket Kit