While attuned to and wearing the amulet, your Constitution score is 10. This has no effect if your Constitution is already 10 or higher. The amulet does not increase your Constitution above 10. Your Constitution score returns to its unmodified value when the amulet is removed or its magic expires.

Once every 30 days, a creature other than the wearer must touch the amulet while casting a spell of 1st level or higher that restores hit points to the wearer. If this infusion is missed, the amulet becomes dormant until infused and grants no benefit. Its magic expires permanently one year after the wearer's first attunement, regardless of infusions.