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.