The JRC JHS-400 is a 400MHz band onboard communication system consists of several portable stations, base station, and repeater antenna system, allowing for smooth communication during steering, loading, unloading and life-saving activities. The portable stations, which are several handheld transceivers, enable you to communicate with each other from any working area, and the base station expands the communication range of portable handhelds. The repeater antenna system relays radio signals between two or more areas that are shielded by ship’s bulkhead, providing an expanded communication area.