have one of these:
Pc + 2m USB cable + 5m USB cable + HUB for signal renewal (external power supply) + 2m USB Cable+5 m USB cable + D-link
captures an open Router 14 or 16 feet away through 4 thick concrete and reinforced walls @ 80%-95% strength depending on conditions.
Saves me 50 bucks a month. Not bad for 15Euroes and a bunch of old cables.