Koller Products AquaView 2-Gallon 360 Aquarium includes energy-efficient LED lighting with 7 color choices plus 4 transitioning and color combinations you can choose depending on the time of day or to enhance your viewing pleasure along with internal power filter that will keep your aquarium water optimal and your fish healthy. This trendy aquarium is designed for easy set up and maintenance. Imagine watching beautiful tropical fish gently swimming back and forth, ideal for helping forget about stress in everyday life. People enjoy watching aquariums as they can be calming and relaxing, as well as a beautiful addition to any home or office. Gravel and decor sold separately. Uses 3 AAA batteries (not included), optional Koller Products 5V Power Adapter (AQ51000) enables light to be plugged into electrical, outlet available on Amazon – item B07C718PHZ. Dimensions: 10.2″ DIA x 10.5″ H. Includes Koller Products XS filter cartridge (available on Amazon – B08BXTLF31) and User Set Up Guide.