Acer 5530 - Manual (Page 19)

Chapter 1 9
Rear View
# Icon Item Description
1 USB 2.0 port Connects to USB 2.0 devices
(e.g., USB mouse, USB camera).
2 USB 2.0/ e SATA
port Connects to USB 2.0 or eSATA devices
(only for certain models).
Note:
If you plug an eSATA device you will have
three USB ports available in the mean time .
3 Modem
(RJ-11) port Connects to a phone line.
4 DC-in jack Connects to an AC adapter.
5 Ventilation slots Enable the computer to stay cool, even after
prolonged use.