Great Compatibility - Compatible with Garmin echoMAP CHIRP; ECHOMAP Plus; ECHOMAP UHD; ECHOMAP UHD2; ECHOMAP Ultra; GPSMAP. See product description for more details. | Powerful Function - Ensures bow orientation on your compatible Garmin ECHOMAP or GPSMAP chartplotter matches your heading. This heading sensor provides a heading output rate at 10Hz and accuracy of plus or minus 3 degrees. Accurate heading even at low speed or in rough waters. | Expertly Made & Superior Quality- Made of excellent quality copper, the sheath is made of PVC (Polyvinyl chloride) material, it has superior performance and corrosion resistance, IP68-rated waterproof connectors are metal tipped to prevent sonar interference. Meeting or exceeding OE specifications. | Plug & Play Installation - This heading sensor installs easily with NMEA 2000 plug-and-play interface. Simple 2-step calibration process for compatible Garmin displays; also supports basic calibration for other displays. 9-axis MEMS technology allows installation in any orientation located away from magnetic interference. | Satisfaction Guarantee - Besttruck values customers shopping experience and provides customers with a good shopping environment. If you are not satisfied with the product, you can choose to return it, we support a 30-day full refund and a one-year warranty.