USB Powered Seven Colour Changing RGB LED Light Tank with Four Colourful Realistic Looking Faux Jellyfish Choose from Seven Different Colours and Watch as In Built Silent Operating Pump Keeps Jellyfish Moving Comes with Two Large and Two Small Sized Jellyfish that Appear Slightly Different Under Each of the Lights Ideal for Children (8 Years and Older) as a Night Light or as a Mood Lamp that Others Will be Jelly-ous Of! Tank Measures Around 24 cm by 20 cm by 9.5 cm | Tank Arrives Empty without Water for Safety Reasons Operates Via Included USB Cable | Requires 5V|1A USB Adaptor (Not Included)