No way to use three or four USBs at the same time on your laptop or computer, take a view at this 4 Port USB Hub, it can surely solve your problem.This is a 4 port USB 2.0 Hub. Easy to use, plug and play. The top loading port gives you easy access fonquick, temporary connections of USB thumb drives, media readers, small accessories such as USB lights and fans, the Apple IPod shuffle, and more. This compact 4 port USB hub is the ideal companion for your laptop or desktop computer. Support up to 127 Hi-speed devices. The small body design of this 4 Port USB Hub makes it easy and convenient to be stored even in your pocket. Support Windows 98, Windows 2000, Windows ME, Windows XP. Friendly and ergonomic designed, this Mini USB Hub is also easy to be portable.Hurry up to have this 4 Port USB 2.0 Hub, it can help you a lot during your daily life while using the laptop or computer.