The sensors work by detecting extremely low-frequency electrical activity over a distance of 5 microns (one micron being equal to one millionth of a metre).

FORBES: Can Forensic Scientists Tell How Old A Fingerprint Is?

Low-frequency electrical stimulation prompts urine storage.

ECONOMIST: We can rebuild him. We have the technology

Due to the frequency of electrical stoppages, the mayor demanded that Chongqing Konka's steady supply be given top priority.

CNN: From Our Correspondent: Konka Goes West

Then, they're able to make selections by focusing on an icon that flashes at a distinct frequency from others, which the system recognizes as a unique electrical pattern.

ENGADGET