Description: Simulation Jellyfish LED Light : ABS material, practical colorful bedroom night light, decorative bedside lamp. Before using, inject 1/2 clean water into the water tank and pour it out after shaking a few times to clean the impurities in the aquarium. Plug in the USB cable, inject water again,up to about one centimeter from the mouth of the bottle, drop 3-6 dish-washing liquid into the water; After flattening the tentacles of the jellyfish, put them in water, cover them and turn on the switch. Great gift and decoration for Christmas, Holiday, Party, Home, Office Bedroom Room;etc. Note: Using for the first time, there will be a lot of bubbles on the surface of jellyfish, which may cause the jellyfish to float un-smoothly. After being placed for a period of time, the bubbles will swim normally or the bubbles can be removed manually. Specification: Material: ABS plastic + electronic components Size: Approx. 10.7x10.7x30CM/4.214.2111.81inch Input voltage/Current: DV5C/500mA Power supply: USB cable connection /4 x AAA batteries (batteries are not delivered) Size Chart: 10.710.730CM/4.214.2111.81inch Package Includes: 1 Set Simulation Jellyfish LED Light Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!