Jiying S2 is a cost-effective underwater booster designed for swimming and diving enthusiasts. The safety lock allows even children to use it with confidence. The built-in battery and the concise way of splitting reduce the cost. This is a boldly innovative design that succeeds in abandoning the buoyancy plate that makes its competitors so bulky. The sleek rounded shape imitates the form of a fish, which minimizes water resistance. The pogo pin charging is fast and efficient and the large-volume propeller doubles speed and performance.