Gateway E3400 System Manual page 13

Power Connector connects the computer power cord. The other end of the
power cord plugs into an AC outlet or power strip.
RJ-45 LAN connector (LAN card) connects a network cable.
Serial ports connect serial devices, such as a musical instrument digital
interface (MIDI) device.
USB ports connect external Plug-and-Play devices, such as keyboards and
pointing devices, that are automatically configured when they are plugged
into the computer through one of these ports.
Video port connects to the monitor interface cable if not using the AGP video
card output.
Voltage selector sets the voltage for your area, either 115V (US standard) or
230V.
6
System Features