To
use the projector over a wireless network, install the
optional Epson 802.11b/g/n wireless LAN module
(PowerLite 1970W/1975W/1985WU). Do not install any
other type of wireless LAN module.
Caution:
Never remove the module while its indicator
light is green or flashing, or while you are projecting wirelessly.
You may damage the module or lose data.