A pen that promises to find hot spots

Given the fascination that gadget makers have always had with the pen, something like this Wi-Fi detector was probably inevitable. After all, we've certainly seen stranger combo writing instruments, including everything from cameras and DVRs to SD card readers

The latest is a natural progression from the "Auto Detective Pen," which warns when you're in the vicinity of a wireless signal that could be used to operate a spy cam or other surveillance equipment. (Chinavasion makes both devices, but at least the hot-spot-finding version isn't based solely on paranoia.)

Using two button cell batteries, the pen has four LED lights that indicate the strength of Wi-Fi signals up to 30 meters away, according to 7Gadgets. And you can even use the pen itself to write down the best locations. How analog.