I went with a buddy to a cemetery and we walked past some recent plants and a couple of MAC addresses popped up. It seemed like the ones planted less than two weeks emitted a signal. Actually he saw it on the internet and tried it and called me to check it out… I couldn’t explain how a signal could be detected 6’ under and in a vault and casket 🤷‍♂️All I can say is there was no living soul in the area and no buildings for 4-500 yards.