Nowadays, Wi-Fi is one of the most essential resource for many mobile users. It is cheap and sometimes free in certain location. We know that most of us need a simple tools just to check the signal without the need to switch on our laptop, and we wonder if there is such a device available on the market. And yes now you have Wi-Fi Detecting Watch. Available at thinkgeek.com for only $30, This wristwatch tells you the wi-fi signal strength at the push of a button. Of course the watch has other features that you can check on the product page.