I picked this up at Wallyworld tonight for 10 bucks!
and yes it's 55mm in lenght and it's riding piggy back
on my Seawolf.
My wife thinks it's cute and I have to agree..
it recharges in 2 minutes with a 4 minute runtime...but I would not take this to a pond with larger fish unless you plan on hunting down the vermit that swallowed it!!!!