Si-Tex Metadata Class B AIS Transceiver. 5"X3.9"X1.9") module that is IPx7 Waterproof rated for flexible location and rugged performance in any marine environment.Class B AIS Transceiver featuring an Rmax Class B engine that provides maximum range and efficient real-time AIS message processing for all message types. Despite its compact size the Metadata Class B Transceiver features an internal 50-channel GPS smart antenna eliminating the need for an external GPS antenna in many installations. It also features NMEA0183 NMEA2000 and USB connectivity for easy plug-and-play installations on recreational or commercial vessels wanting to send and receive AIS data.Unit will need to be mounted with a clear view of the sky to utilize the internal GPS antenna. Features of Si-Tex Metadata Class B AIS Transceiver: Power 12 to 24V DC Power consumption: 150mA at12VDC