Linksys re4100w User Manual page 4

Side
Power Switch European versions only.
Audio Port Connect the extender to your speaker.
Wi-Fi Protected Setup Button Use Wi-Fi Protected Setup to automatically and securely add
compatible wireless devices to your network. Refer to Using Wi-Fi Protected Setup on page 7.
Reset Press and hold for about five seconds to reset to factory defaults. You can also restore
the defaults from the Administration > Factory Defaults screen in the extender's browser- based
utility.
Bottom
Ethernet (blue) Connect wired devices to your wireless network with Ethernet (network) cables.
The green light turns on when an Ethernet device is connected and active on this port. The light
blinks when the extender is sending or receiving data over the Ethernet port.