27/40MHz radio control racing submarine ship for kids Suspending at a specific water depth 360rotation at specific depths Straight line diving navigation With a remote waterproof transmitter Exercise your kid's mental ability and physical coordination Specifications: Item Name:3311 Mini Submarine Color:Blue,Yellow Product size:15x6.8x4.5 cm/5.912.681.77in Charging time:25-30 mins Discharging time:15-20 mins Dive depth: 0.5m Speed: 0.1m/s Battery for submarine: 3.7V 120mAh Li-po Battery for transmitter:6x 1.5V AAA (Not included) Function: Forward, Backward, turn left and right Package Included: 1 set of Submarine