The P.K.E. Meter has 4 charges. As a bonus action you can expend one charge to activate the meter for one hour, during which time you have advantage on Intelligence (Investigation) checks concerning the undead, curses, and extra-planar entities and objects.
Additionally, while activated the P.K.E. Meter’s crystals will glow in the presence of the undead, cursed items, or things not native to the Material Plane to a radius of 120 ft. The following colors indicate the type of presence detected:
Red Undead, particularly ghosts, spectres, wraiths, etc.
Green Creatures and objects not native to the Material Plane
Blue Cursed creatures and objects
The closer the meter is to the source of the P.K.E. signature, the brighter its crystals will glow. The crystals will flash when they are within 10 ft. The glass orb contains glowing red, green and blue mist that swirl and coalesce towards the general direction of the source.
The P.K.E. Meter regains 1d4 charges daily at dawn.