|See if you can get the answer this way.|
Here is a start.
netgear ex2700 wireless extender password
"You can now connect your wireless devices to the Extender’s new SSID. The extender’s wireless network name (SSID) changed to your existing WiFi network name with “_EXT” at the end. Password to be used will be the same WiFi password on your main router.
Existing WiFi Network name (SSID): MyHomeNetwork
New Extender WiFi Network name (SSID): MyHomeNetwork_EXT
Note: If your wireless devices has a WPS feature; just press the WPS button on the EXT and within 2 minutes, press the WPS button on your wireless device to instantly connect them without typing the wireless password."