It is the instrument of a kind of like of watch, if the person takes to rise it, the person will float.Then, it have a small importation machine up.Write down the place that you want goes to, it will take you.Arrived the purpose, will come to a stop.It only forbid to want any fuel the human thermal energy, can start it.He would according to the rate of speed of the lettering, the decision is flat-out
It's one kind of the instrument like a watch. If you wear it in the water, you will float with it on which there is imput device which is written with the destination you are going.It will take you to that destination and stop. It doesn't need any kind of fuel except human energy to start it. It will decide by itself to go fast or slow by writing.