This adapter converts a Humminbird #9 connector transducer to a #14 sonar connector on your ONIX unit. This adapter can be used when moving from a standard 200/83 kHz transducer like the XNT 9 20, XNT 9 20 T, XTM 9 20, XTH 9 20 or XP 9 20 to work with an ONIX Dual Beam unit. It can also be used if you have one of the above listed transducers that is used in conjunction with a Side Imaging transducer on an ONIX Side Imaging unit. If you use this adapter with the XHS 9 HDSI 180 T, you will lose Down Imaging sonar. This adapter does not support any Down Imaging functions. ONIX 2D models would support only 2D sonar ONIX SI models would support only 2D/SI sonar Note:  This adapter cable should not be used with the Minn Kota US2 transducer adapter for Type 9 2D MKR US8.  The proper Minn Kota US2 cable for ONIX is the MKR US2 13. This only supports 2D sonar.