Manufacturer: Garmin 010-00764-01
A compact chartplotter from Garmin, the GPSMAP 421 features and ultra-bright 4 inch QVGA display and an improved high-speed digital design for increased map drawing and panning speeds. Accepts BlueChart g2 Vision cards for added features.
Contains worldwide satellite images in place of traditional maps. Internal GPS receiver. Dual frequency transducer allows clear illustration of depth contours, fish targets and structure whether you're fishing in fresh or coastal waters.