Brand new(in retail package) 4 port USB hub.
Simply plug into USB socket on your PC, then plug your USB devices into any of the 4 sockets on the hub.

No driver or power supply needed, just plug it in & use it.

Will work with any operating system that supports USB, if you can use USB now it'll work fine with this hub(it makes no difference)
eg: Windows 95 OSR2, Windows 98/ME/2000/XP,Linux,MacOS 8.5+, etc.

Can supply up to 400mA of current per port.
Includes over current protection circuits to prevent any possible damage.

NOTE:
From information I can find, & by copying files from a USB2 memory stick, this appears to be USB1/USB1.1 speed only. Hub uses a AU9254A21 chip, which appears to be USB1.1
Most USB2 devices should work either way, but might not be able to use at USB2 speed.
As with any un-powered hub, it's possible this might not be able to supply enough power for some devices that require a lot of power. Eg: some external hard drives etc.