good quality, good design. it uses infrared signals, so it's range limited also because of being underwater. the video camera is dated. images look like those cheap small cameras 10 years ago. for its toy purpose as a submarine, it's great. it has proportional throttle on all channels. the water seal is well designed.
Very fun to use in a decent sized fish tank. Camera quality is very basic and controls are less reliable if there are bright lights on or near the fish tank.