Bought from Maplins on a Christmas sale for a tenner including a reasonable 2 ch 27mhz radio (it sticks to one frequency) - cost was actually less than a spare set of batteries. Probably the fastest boat I have owned and probably the fastest at my old club. It has a strange underwater section - U shaped with deep triangular sections enclosing the U and a flexible 28mm 2 blade propeller - nick named Darth Vader by our newsletter/site editor the name stuck.