While I do not have any financial ties to tendollarzapper.com I suggest that you get one from them and compare it. I think that you might want to keep it.
Of all the competing zappers, I find it one of the most impressive considering price, quality, ruggedness, etc.
It does use alligator clips and it does not have an on-off switch but it does have a LED.
I would rate it as 5 times as good as the zapper plans zapper. Of course, everyone knows what zappers I consider to be the best. Too bad you can not get the MX anylonger.