Dell S518WL User Manual page 45

USB (mini type B) port: One mini type B
connector for firmware upgrade.
USB Power (5V/1.8A): One USB Power
(5V/1.8A) for power only
RS232 port: One 9-pin D-sub for RS232
communication.
RJ-45 port: One RJ-45 connector for build-in for
network control and LAN display.
Light Source Up to 20,000 hours in Normal mode
Specifications
45