http://www.macnn.com/articles/04/07/15/wifi.spy.detector/
Marware offers WiFi Spy network detector
updated 04:35 pm EDT, Thu July 15, 2004
WiFi Spy detector
Marware today released its , a $30 keychain-sized 802.11b/g wireless network detector. As you press the button, the WiFi Spy scans for a WiFi signal and shows the signal strength in the four bar lighted display. Since the WiFi Spy is directional, you can track down the source of the wireless signal to insure a good connection. It can fit on a keychain or attach to the zipper of a laptop bag. It is helpful for travelers, making looking for network hotspots in airports and other locations a easier.
