I know absolutely nothing about these things, but i did take it to my duaghter who is a rn and she said it works great.Medical instruments littmann stethoscope it only needs one ear bud, but she said those cost almost nothing.

New nurse medical analog stethoscope watch medical instruments new nurse medical analog stethoscope watch. Brand new, firts quality, prestige medical watch. Analog watch attaches to all stethoscope tubing and features a 24 hour dial, adn a 15 second marked quadrant. If you need an item by a certain date please inquire before purchasing.

Offers the exceptional versatility of na adult and pediatric-sided stethoscope. Outstanding acoustics and superior versatility are combined in the technology of the.3m littmann cardiology iii stethoscope medical instruments also features solid stainless steel chestpiece, two-tubes-in-one design, nonchill rims, adjustable double-leaf binaural spring and patented 3m littmann snap-tight soft-sealing eartips.