two AA batteries are needed for power supply (the batteries are not included in delivery, users must prepare themselves Note: There are many colors of the ball and the bullet Color of beaver hairs, and they will be shifted at random. Delivery amount: 3 pieces Instructions for use: 1, Start by Separate the middle ball, put two “AA” batteries in the battery case according to the positive and negative poles, operate the switch and close the cover. (Please note that the battery must be installed in the opposite direction, do not be fooled by its spring) the positive pole on the left side, the negative pole on the right side to the outside 2. When you play in the water, it is not easy to take too much time (half an hour is suitable), because the sphere can penetrate the water too long and the ball can flow to the bottom 3. When you do not play, pour the water into the bullet, remove the battery and dry it in a dry place. 4. This product uses a high energy efficiency engine, which not only