Specs indicate up to 30' range, 2.4Ghz. But what I don't get is it states clear line of sight, when RF is not a line-of-sight technology...that would be more like IR. Am I missing something?

http://www.newegg.com/app/viewproduct.asp?description=82-333-002&DEPA=0


$21.20 at compgeeks.com (though out of stock, and that does not include shipping).