Asus M51BC User Manual page 13

Rear panel
Power connector. Plug the power cord to this connector.
RATING: 115Vac/220-230Vac, 7A/4A, 60/50Hz.
Power switch. Switch to turn ON/OFF the power supply to your computer.
USB 2.0 ports. These Universal Serial Bus .0 (USB .0) ports connect to USB
.0 devices such as a mouse, printer, scanner, camera, PDA, and others.
Optical S/PDIF_OUT port. This port connects to an external audio output device
via an optical S/PDIF cable.
USB 3.0 ports. These Universal Serial Bus 3.0 (USB 3.0) ports connect to USB
3.0 devices such as a mouse, printer, scanner, camera, PDA, and others.
ASUS M51BC 13