Another tool that was created to hunt / find wi-fi network. although when viewed from the experience, this tool has never worked as we expected, but at least it can still work as bolpoin, so you are not to "loss".
To use it so easily, just pressing a small button that located at the tip of the pen, so 4 LED will flash, that shown you the signal strength of wi-fi hotspot near you. Price of this bolpoin only $ 13.99, are you need it? :D