The USB Desktop Aquarium is a smart addition to your child's study space and uses your computer as its sole power source. Besides its functionality of storing pens, scissors and other supplies at arm's reach, it gives kids the opportunity to observe fish swimming and living in a mini habitat that's small enough for a desktop, yet large enough for small fish to live comfortably. Features running water, a low voltage pump and an adjustable desk light for the little fishies or for an ambient room light. Extra features include nature sounds, multicolor interior lights and an under-gravel filtration system. An LCD calendar displays time/date/week info with temperature and an alarm clock with snooze function; plus a countdown timer that's helpful with homework planning. Includes: Mini fish tank that holds approximately 1.5 quarts water, USB connector (must run on USB power supply; AC/DC adaptor not available), Multifunction penholder, Nature sounds, Multicolor interior lights, Under-gravel filtration system, Low voltage pump, White and black pebbles, Decorative Plant.