Features: The 12 double Channel AIS Receiver enhances marine safety with simultaneous RS232/RS422 outputs, efficiently acquiring data for yachts, cargo ships, and navigation systems while maintaining stable performances in complex marine environments. Featuring 5 AIS messages/sec refreshing rate and IP67 waterproof aluminum plastic construction, this marine accessory ensures real time vessel tracking via USB connectivity for seamless integration with chartplotters and PCs. Ideal for professional , research teams, and leisure boaters requiring stable AIS data transmission across commercial vessels, scientific expeditions, and private watercrafts navigation systems. Optimized for harsh marine conditions, its compact design withstands saltwater exposure on ship bridges, research vessel decks, and coastal monitoring stations while delivering uninterrupted signals clear . Outperforms standard single channel receivers through grade electronic components and double data processing capabilities, making it essential equipment for marine analysis and studies. Specifications: Type: AIS receiver component : ABS Length: about 10cm/3.94inch Operating current: <120mA Package Includes: 1 set x AIS Receiver note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.