The AIS250 is a dual-band "listen only" AIS receiver designed for use with your C or E series or other manufacturers' AIS-ready displays. AIS targets will display target name, course, speed, vessel information, navigation status, and more! The AIS250 is ready to go out of the box. The receiver has a built-in VHF/FM splitter allowing for integration with your existing FM stereo and VHF antenna, no additional AIS antenna is necessary. NMEA 0183 output. Note: May require C or E series software update. Ships complete with AIS receiver, power cable, and VHF cable. Measures 8.6"W x 6.7"L x 2"H. Two year warranty.