Sony PCG-F540 Primary User Manual page 63

You can add functionality to your computer by connecting any of these
peripherals:
Phone line (page 52)
Port replicator (page 53)
Printer (page 58)
External display (page 59)
External mouse or keyboard (page 62)
External speakers (page 64)
External microphone (page 65)
Digital video camera recorder (page 66)
Universal Serial Bus (USB) device (page 68)