This Bluetooth-enabled heading sensor contains a compass that detects your boat’s heading and communicates it to your trolling motor to enable the Spot-Lock Jog feature, which lets you move your Spot-Lock 5 ft. increments in any direction. Available as an add-on accessory for PowerDrive and Riptide PowerDrive trolling motors that come pre-installed with Bluetooth i-Pilot systems (model year 2017 and after). This heading sensor comes standard with Ultrex, Ulterra, Terrova, Riptide Ulterra, and Riptide Terrova trolling motors that come pre-installed with Bluetooth i-Pilot and i-Pilot Link systems. (Model year 2017 and after). ?HEADING SENSOR ONLY. Compatible with Bluetooth-enabled i-Pilot systems only. Refer to the original product manual to ensure system compatibility. Power lead length: 12.5′.