The Mobile Edge WiFi Signal Locator (SL) is the smallest and most convenient way to check for hot spots without going through the tedious process of having to first boot-up your notebook and then search for a signal. By attaching the WiFi SL to your key chain or carrying case you will always be immediately aware of the presence of local hot spots! The Wifi SL is half the size of the nearest competitive product and uses proprietary, patent-pending technology to eliminate false readings caused by such common objects as microwaves and portable phones.