000-15793-001B&G V100-B Blackbox VHF Radio System Model: 000-5793-001 Integrated Class B AIS transmitter & receiver Class D DSC approved VHF radio Integrated GPS receiver Connect up to 4 wireless and 4 wired handsets Add an optional loudhailer and up to 4 external speakers NMEA 0183(R) and NMEA 2000(R) connectivity Bundled with dedicated GPS receiver, GPS-500 for AIS transmission. 60 second audio rewind Configurable external speakers with volume offsetting Handset backlight settings can be grouped with NMEA2