There should be a USB 2.0 logo somewhere on the box that states which speed the device will operate at, and here is where it gets a little bit interesting.
USB 2.0 logo only - likely a low-speed device with 1.5Mbps transfer rate.
Oh btw, if I had thrown away the box, then is there any tool or software to able to check the transfer rate for webcams? Or any other way to know? thanks.
if your computer have a USB 2.0 port, plugging any USB 1.1 devices into it, Windows XP will pop up a balloon saying "Low speed usb plug into high speed port" or something.