This accessory is compatible with the following Humminbird products Transom Speed & Temp Sensor. Compatible with: ALL HELIX Series, ONIX 10 - TS W+ PC 12 ST, ONIX 8 -TS W+ PC 12 ST, SOLIX 12 TS W+ PC 12ST, SOLIX 15 TS W + PC 12 ST, 700 HD - TS W + AS TY, 600 Series TS W + AS TY, 500 Series, 800 Series, 900 Series, 1100 Series.
eBay