A Stethoscope can be bought from Martin Thwait at the Rogue's Den. Level 50 Thieving and Agility is required to access Martin Thwait's store and purchase the item.
A stethoscope increases the chance of successfully cracking the Wall safes in the centre of the Rogue's Den main chamber, near Martin Thwait. A stethoscope, however, has no effect when cracking the safes in the minigame itself or for any other thieving activity, like opening locked chests.
A stethoscope has no known medicinal or health use in RuneScape, unlike on Earth.
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