This is like the holy grail of after hours computer techs, Do you have any idea how hard it is to diagnose Wi–fi reception problems? You have to do trial and error equipment placements for ever. The same setup in one place is totally worthless in another. It wold be darn cool to be able to pull this out of your kit and show the customer what the local environment is like.
Wi-Spy is the world’s smallest 2.4 GHz spectrum analyzer, and has been designed specifically for troubleshooting and analyzing Wi-Fi networks. It shows the signal strength for all Wi-Fi networks as well as Bluetooth, 2.4 GHz cordless phones, microwaves, Zigbee, and all other 2.4 GHz transmitters. At a glance you can see what Wi-Fi channels are quiet and what channels you should avoid if possible. This makes it easy to pick a quiet channel for your access point instead of picking your favorite number between 1 and 11.