Fish Hawk X4 Probe

The X4 Probe gathers trolling speed and water temperature from the depths and uses a sonar signal to send that data back to the boat. Replacement probe for X2 and X4 System. Backwards compatible with Model 840. KEY FEATURES: Wireless sonar data transmission Ultra-long battery life (4 AA batteries not included) Detects speed changes of 1/10 MPH Water activated auto on/off Leak-proof double o-ring design Includes breakaway double snap swivel and probe bumper Made in U.S.A.