AS GPS HSPrecision GPS Antenna w/Heading SensorThe AS GPS HS is a precision GPS receiver with heading sensor provides fast position fixes with an accuracy within 2.5 meters. An internal compass also provides constant boat heading displayed on your Humminbird chart screen, even while sitting still. This heading sensor makes it easy to understand your boat's direction in correlation to the GPS chart for precision boat control.Compatible with the following models: all SOLIX (with AS GPS NMEA adapter), all HELIX 12, all HELIX 10, all HELIX 9, all HELIX 8, all HELIX 7 G2N & G3N, all MEGA 360 Imaging models, all 360 Imaging models, all ONIX Series*, 859ci HD Combo, 859ci HD DI Combo, 859ci HD XD Combo, 899ci HD SI Combo, 959ci HD Combo, 959ci HD DI Combo, 959ci HD XD Combo, 999ci HD SI Combo, 1159ci HD Combo, 1159ci HD DI Combo, 1159ci HD XD Combo, 1199ci HD SI ComboReceiver dimensions: 3.25 diameter, 1.5 high and comes with 20' cable and has a 1-14 thread count stem mountable with an optional antenna stem (antenna stem not included). This receiver requires software 6.570 or higher in the compatible Humminbird product. Note: SOLIX and ONIX Series require purchase of AS GPS NMEA cable for connection. APEX requires the AS GPS adapterWhen used with 360 Imaging, provides the ability to mark accurate waypoints anywhere on the screen.Note: this GPS receiver WILL NOT work with InterLink.1-Year Limited WarrantyWARNING: This product can expose you to chemicals including LEAD which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.