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 USB 2.0 High Speed 4 Ports Octopus Hub for PC. This mini 4-port USB hub provides an easy way to add up to 4 USB peripherals. Just plug the USB hub into your computer and you have a portable and easily accessible way to connect other USB 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.