Features: Enhances your maritimes safety with our 5 watt CLASS B+ AIS transponder, ensuring stable signal transmission and increased visibility for vessels in various waters. Featuring double channel designs and NMEA0183 compatibility, this device precisely captures surrounding vessel information and easily integrates with other navigation systems. For private or commercial vessel owners, sailing enthusiasts, professional crews members, and navigation experts seeking accurate positioning and enhanced safety. Perfect for complex waterways, port entries, sailing competitions, and fishing operations, providing real time data to prevent collisions and improve operational efficiency. Built with high quality materials and advanced technologies, this marine navigation device is corrosion resistant and energy efficient, offering a user friendly interface for seamless operation. Specifications: Component:Plastic Size:Approx.16x14x4cm/6.3x5.51x1.57inch Color:Black For Matsutec Package Includes: 1 Set Marine Collision Avoidance Device note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual coloring of the item. Thanks for your understandings.