The USB Jellyfishes Mini Aquarium with Moody Light illuminates FIVE soft colors circularly. Watching the lifelike Jellyfishes swimming, let your stress fading away and gives you sensation of relaxation. It is so simple in the operation! Just add water into the tank, connect the USB cable to the USB port. A small motor generates a current in the water, encouraging the jellyfish to swim gently and freely. The Jellyfishes won't starve or make a mess, they just swim and sleep whenever you want. If you hate your messy desk and feel tired of your busy day, get one USB Jellyfish Mini Aquarium with moody light. It brings harmony to your workplace and calms your mind.