The GPS 24xd position receiver and antenna gives you precise location with multi-band GNSS and heading accuracy even at slow speeds. GPS 24xd HVS includes power/data cable & update rate select cable. Multi-band GNSS provides location accuracy to within 1 meterMagnetic heading sensor provides accuracy to within 3 degreesFast 10 Hz position update ratesAccess to four key global navigation satellite systems (GPS, Galileo1, GLONASS and BeiDou)Multi-SBAS compatibility corrects signal measurement errorsInstallation is easy with under-deck, pole and surface-mount options