This depth finder does not have an internal On-off switch so make sure you wire one into it. I also had problems with the readings going haywire after initial installation following the installation instructions to a tee. I had to deviate and mount the transducer much higher than they recommend to get a reading. The readings still goes haywire when on-plane though not much I can do about that. 2 stars

I TRIED 2 PUCKS, "THRU HAWL" -- READINGS WERE NEVER STABLE ENOUGH TO KNOW IF YOU WERE IN 4 FEET OF WATER OR 11 FEET OF WATER... THESE PUCKS WERE INSTALLED JUST 1/8" FIBERGLASS TO TRANSMIT THRU AND IN ACCORDANCE WITH THEIR INSTRUCTIONS... NEXTED I TRIED THE TRANSOM MOUNT RIGHT SMACK IN THE WATER, SITTING WITH NO ENGINE RUNNING AND 1/2 THE TIME IT SEEMED NORMAL BUT THEN IT WOULD START JUMPING AROUND..... THIS TYPE OF BEHAVIOR MADE ME FEEL I COULD NOT TRUST THE INDICATION I WAS SEEING.......... DON'T WASTE YOUR TIME OR MONEY!!!! THERE ARE OTHERS OUT THERE THAT WORK BUT MAY COST A FEW EXTRA DOLLARS BUT THAT'S YOUR CHOICE... 1 star

The product was new and packaged in orginal packaging. Condition excellent. We have not put the depth finder in our boat yet, but it looks like we shouldn't have any problems with it. 5 stars