So if you have a home or office wireless network (lets call it "MyNetwork-1") and you need to wirelessly expand the range you need to be cautious about the equipment you purchase. An "extender" simply captures your WiFi router/switch signal, boost the signal and retransmits it. Unfortunately it transmits under a different network name (lets call it "MyNetwork-2"). So now you can take your laptop 100 feet futher BUT you must connect to "MyNetwork-2". Well if all of your wireless devices such as your printers are connected to "MyNetwork-1" you are just SOL. (Simply Out of Luck)
Repeaters as the name suggests are "suppose" to allow you keep your original network name by acting as an Access Point and boasting the signal. Sadly most of the non-commerical units available at the box stores like Fry's or Best Buy are nothing more than "extenders" with a misleading name. A true repeater they are not.... Let the buyer beware. Also know that most of the clerks at these box stores don't have a clue. You will get the deer in headlight stare or a misleading answer.
If you can live with 2 or more network names, then these units do work. A better option is to hard wire Access Points (WAPS) back to your router, buy a true repeater(expensive) or get a high performance router with maximum range and forget about trying to extend.
teddo