How to use it:1. Pull the tank cover, add water inside till full2. Put the small Jellyfish into the water3. Using the 3x AA Battery (not included)4. Press the On/Off Button to get work5. It can also be powered by DC4.5V Adapter (not Included)Jelly Ball Product Features:The Water Ball Aquarium provides a soothing underwater world of floating ball fun.LED lights in the aquarium base give off a multi-color glow.Enjoy owning your beautiful jelly fish aquarium without worry about cleaning and maintenance.Watch as the ethereal jellyfish swim just like go to visit aquarium.Material: plasticColor: blackPower supply: 3 x AA batteries(not Included)Size: approx. 23x7.7x7.7cm(L*W*H) / 9\'\'L x 3\'\'W x 3\'\'HPackage includes: 1 x LED Tank