If you want to find out if there’s a wifi signal, there are several options. You can turn on your laptop, PDA or smartphone, you can use one of those Wifi detecting keyhangers, or you can wear this Wifi Detecting T-Shirt! A signal detector is built into it so the strength of the signal is shown on it by glowing bars. It is powered by a small built-in battery pack that takes 2 AAA batteries.
A small warning, perhaps. Obviously, you can’t just wash this thing like any other T-shirt. You have to unplug the battery (of course!), hand wash it, don’t wring it and dry it lying flat in the shade. Also, don’t iron it over the image and for the love of God, no dry cleaning (would probably dissolve the entire detector)!
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