Wi-Fi Detector Shirt
The glowing bars on the front of the shirt dynamically change as the surrounding wi-fi signal strength fluctuates.
Product Features:
Glowing animated shirt dynamically displays the current wi-fi signal strength.
Shows signal strength for 802.11b or 802.11g
Battery Pack is Concealed in a Small Pocket Sewn Inside the Shirt
Runs for hours off three AAA Batteries (not included)
Heh, I HAVE one of those...:)
...which requires one to hire an assistant to walk ahead with a mirror on his back....