I have a 4300 you can have for postage. Don't know what the difference is, but 4300 sounds like a step up. Has a speedometer. maybe that's the step.
Screen always darkened in the sun - bad trait for a sonar in the West. Last I used it it worked fine, but I never cared much for it. Been sitting for 10 years.
I'll hook it up and test it if you want it before I box it up. Can also send pictures.
rickwebb204@gmail,com