The Garmin 400 and 500 range are supplied as standard by Garmin with an internal antenna. They have the facility to take the Garmin GA29 external antenna if required. To order a GA29 antenna please check the accessories section on this page. This unit is preloaded with a UK and Ireland BlueChart marine chart. The sleek 450-series plotters pack a lot of value into their space-saving formats featuring ultra-bright 4” QVGA displays and ready to launch out of the box with built-in UK & Ireland BlueChart cartography. A new worldwide satellite imagery internal map and a streamlined user interface. Optional BlueChart g2 VISION ™ cards add true 3D-view detailed mapping capabilities (both above and below the waterline), plus helpful Auto Guidance, hi-res photo-mapping detail, and “real picture” aerial photos of ports, harbours, marinas, waterways, navigation landmarks, and other points of interest. Product Features and Specifications Ultra-bright 4” diagonal QVGA display, 320 x 240 pixels New streamlined user interface offers easy selection of modes and features Preloaded with marine map detail of the UK & Ireland plus a worldwide satellite imagery internal map Single SD memory card slot for optional BlueChart G2 VISION cards BlueChart G2 VISION cards provide: - High resolution satellite imagery which can be overlaid on to the basemap - 3D charting information for a true “mariner’s eye view” perspective - 3D perspective below the water line for displaying bathymetry in a “fish eye view” - Auto guidance technology suggests the best course to a destination - Navigationally significant aerial photographs - Coastal roads and points of interest detail Built-in receiving antenna with remote antenna capability – BNC connector for optional GA29 antenna Backlit keypad for easier operation at night Two NMEA0183 I/O ports Unit dimensions: 5.7”W x 5.0”H x 2.7”D Package Includes GPSMAP 450S Preloaded with UK & Ireland Bluechart Unit Protective Cover Tilt/swivel mount Cables Owner's manual