As humans, we are naturally curious about the world around us. While we oftentimes tend to put more focus on things we can see, there are those of us who are interested in the things that are not visible to the naked eye. That’s right, ghost hunting. We’ve all wanted to give it a try before, but the equipment for it is normally far too expensive.

The Mr. Ghost iPhone EMF Detector will let you hunt down those spirits through science! This electromagnetic radiation detector plugs directly into the headphone jack of your iPhone. It can sense the EM radiation from household appliances, and can even record the sound that it makes. Through the app, you’ll be able to see the changes in the EMF in a variety of ways that include a digital numeric readout, color, and light. This will only cost you around $20, and comes in a few, simple colors.