Ring of X-Ray Vision

As an action speak its Command Word. You can see into and through solid matter for 1 minute. This vision has a radius of 30 feet. Solid objects within
that radius appear transparent and don't prevent
light from passing through them. The vision can
penetrate 1 foot of stone, 1 inch of Common metal,
or up to 3 feet of wood or dirt. Thicker substances
block the vision, as does a thin sheet of lead.
Whenever you use the ring again before taking a
Long Rest, you must succeed on a DC 15 Constituti