The K-II meter is used by ghost hunters to find indications of paranormal activity by looking for sudden erratic readings (spikes) of the lights . A man-made Electromagnetic Field (EMF) creates a steady reading while the spirit worlds energy is believed to be what creates the impulse readings on the K-II meter. Researchers using the K-II meter have been able to do actual communication sessions with what is believed to be ghosts. The spirit is simply instructed to light up the lights on the meter in response to specific questions. For example, the ghost can be asked to respond with spiking up the lights of the K-II meter once for a no answer to a question and to light up the lights of the meter twice for a yes answer to a question.
K2 EMF meter with a low buzzer has an audio alert when EMFs are present. The sound is an aftermarket modification. The K2 has a wide frequency range to cover a huge bandwidth from low to high EMF frequencies. It is portable to fit in your hand and lightweight to fit into your pocket or purse. The K2 is also easy to see in the dark because it has led lights that light up in different colors when there has been an increase in the EMF level.