Quick way to spot these electronic-loving spirits is watching their behavior near any powered equipment. They'll zoom around way faster within 15 meters of active devices, even stuff just lying on the ground, and instantly slow down when moving away. Worth noting they can start hunting at higher sanity when theres equipment nearby, about 65% instead of usual 50%

When it starts hunting your equipment will go crazy from much further away than normal, so if your stuff starts flickering earlier than expected thats a pretty good sign. Its actually really helpful to test by dropping a powered flashlight somewhere safe and watching how the ghost speeds up when it gets close

Maybe interesting that you can use this against them too, try keeping most equipment turned off or packed up until youre sure what youre dealing with. If you notice really wide electronic dead zones during hunts and crazy speed changes near gear clusters, youve probably got one of these on your hands