Pre-programming is required.Register your AIS here prior to shipping. www.westmarine.com/ais-registration Class B AIS lets you see and be seen on the water.Take advantage of the ACR AISLink Class B Automatic Identification System (AIS) Transceiver and ensure that you can see and be seen on the water. Perfect for areas of high congestion or for those times when visibility is poor, the AISLink Class B allows users to transmit important information about their vessel while also receiving real-time AIS transmissions from others.Approved Worldwide: The ACR AISLink CB1 AIS is approved worldwide and is an extremely reliable transceiver which incorporates a number of convenient user features.Internal GPS: With an internal GPS antenna, which makes an external antenna optional, you can save time on installation while also saving on space.Small Black Box Design: Additional design features which offer further convenience include a small, rugged, and waterproof (IPx7 certified) design with low power consumption.Simple Integration: The AISLink CB1 also features NMEA 0183 and NMEA 2000 data output for seamless interaction with navigation systems.Silent Mode: The ability to place the transceiver in silent mode also provides both privacy and security as this enables users to turn off the transmission of identifying information while still seeing transmissions from other vessels with AIS.Key FeaturesInternal GPS antennaApproved worldwideLow power consumptionEasy installationSilent modeMultiple interfacesWaterproof (IPx7)SpecificationsDisplay Type: LED backlit LCDScreen Resolution: 240 x 128Data Interface: NMEA 2000, NMEA 0183, USBDimensions: 5 1/2" x 3 7/8" x 1 7/8"Weight: 9.87 oz.Voltage Compatibility: 12 to 24V