SeaStar DK4220 SmartStick Sensor & Gauge KitFor real-time information at the helm, SeaStar Solutions offers a SmartStick position sensor and gauge option. A high-visibility position scale provides the driver with an at-a-glance visual position indicator. The SmartStick sensor is a non-contact linear position sensor, so there are no moving parts to wear out. All the electronics are integrated into the sensor body, making it fully waterproof.Features: For use with SeaStar Jack Plates; Provides precise height information; Environmentally sealed; Non-contact linear position sensor; **Note: SeaStar Heavy Duty Jack Plates, JP4040HD (4" setback) and JP4060HD (6" setback) are not compatible with the installation of an aftermarket SmartStick sensor kit, DK4220.