Poseidon is a new type of diving equipment that uses a structural principle similar to a rotary wing drone, as to achieve flexible movement, keep balance and oxygen supply for underwater operations. This product is carried on the diver's back, liberating their hands, adjusting the direction and speed of the four propellers by freely adjusting different modes, as to achieve underwater propulsion, underwater keep stability and static and meet any angles underwater Floating needs. So this product brings a full range of freedom to control and experience for underwater activities.