Power and connect your compatible GPSMAP device with this 8-pin power/data cable. Use with NMEA 0183 devices and a lamp or horn for visible or audible alerts. Compatible with: echoMAP 50dv, echoMAP 50s, echoMAP 70dv, echoMAP 70s, GPSMAP 527, GPSMAP 527xs, GPSMAP 547, GPSMAP 547xs, GPSMAP 721, GPSMAP 721xs, GPSMAP 741, GPSMAP 741xs, GPSMAP 820xs
