Icom MA-500TR Class B AIS Transponder MA 500TR w/ Display & Cable REFURBISHEDIn perfect working condition with warranty. You will receive what you can see in the photos. Class B AIS Transponder for Pleasure & Fishing Boats An AIS transponder on your boat automatically receives information broadcast by other AIS equipped vessel's and base stations, all while your own vessel's static and dynamic information is being transmitted. AIS signals may reach where radar cannot, showing AIS equipped vessels that might otherwise be