Sony VAIO PCG-R505JLK User Manual page 63

Connecting USB Device
You can use an optional Sony USB mouse PCGA-UMS1 series (not supplied)
with this notebook. Since the USB mouse software driver is preinstalled in the
notebook, you simply plug the USB mouse into the USB port to use it. One USB
port supports one USB device.
See the manual that came with your USB device for more information on its
installation and use.
To
USB
Connecting a USB Device
USB mouse
63