A fast attack sub with some nice fire power and unique drive system. Kind of pricy, I needed all the props to provide the speed I wanted with a smaller prop size and all the lights come in handy under water after dark. This sub will do 70 to 80 Km/h or approximately 40 knots.   Forward key will make it descend. 
See video of this sub in action at https://www.youtube.com/watch?v=Gwb-eDHmh_k