Column of Half-Ball shape,Elegant design with Aqua in side of the Aquarium 4 Ports USB 2.0 Hub. No external power adapter supports self-powered mode! Feature:100% brand new Aquarium 4 Ports USB 2.0 Hub for Laptop Desktop.USB hub connect up to 4 ports USB hub at one timeSimply connect the Hi-speed USB Hub to any USB 2.0 Hub port on your computer, then it is readyNo AC adapter, driver requiredPlug and play, hot swappable4 ports USB 2.0 hub can be added or removed without the need to rebootAquarium design adds aesthetic eye candySpecifications:Size: 83 x 47 (mm)Weight: 272gCable length: about 1.2 meterSystem requirements: one USB port availableOperation System: windows 98SE/ME/2000/XP/Vista; Apple/Mac OS 8.6 or Above,Package contents:1 x 4 Ports USB 2.0 Hub with USB cable