I bought this item back in Sept. 29th 2011. My fault as I did not check item worked until now Jan 4th 2012 (as I did not need to use it until now) Well I could not get it to work ? as I have missed the return date I decided to see what the problem was ?
Basically this is a sealed at the factory fish finder, (wireless) So when the battery is dead you throw it away, but at least you get approximately 500 hours battery life out of it. Not in my case, I am a technician to trade so I decided to investigate why my one failed to work ? Nothing to lose as I cant return it. So I carefully cut open the sealed plastic unit at the seam
and revealed a circuit board and underneath this should be a battery ! well not on this one, some one at the factory had forgotten to put one in...just my luck.
So I did get it a cheaper than normal price, but suffered for it. £30 down the drain.