Fish Hawk X4 Probe

The X4 Probe uses a sonar signal to send water temperature, and trolling speed information at the downrigger ball to the boat.

• Detects speed changes of 1/10 MPH
• Probe uses a 70kHz sonar signal to send data
• Water-activated probe extends battery life 
• Powered by four AA batteries
• Includes swivels to attach downrigger weight
• Epoxy potted electronics with double O-ring battery cap
• Compatible with legacy Model 840