Specifications: Type of Bulb: LEDSize: 18 x 10 x 23cmPress the LIGHT button to change the light color modePowered by: 3 x AA batteries (not included) Material: ABS silicone(artificial jellyfishes)+electronic componentsHow To Use1.Add water to the tank and a few drops of liquid dish soap to the water (getting your jellyfishes to swim about properly) 2.Soak the jellyfishes in the water for about one or half day, (Remember that the longer the jellyfish soaks in water, the better the jellyfish swims)3.Take out the jellyfishes and pour out the water, add fresh water to the tank of top scale4.Place the jellyfishes into the water tank after washing, add a few drops of liquid dish soap to the water5.Cover the liquidPackage: 1 x aquarium light3 x Plastic Jellyfish1 x USB Cable