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Since its introduction in 2003, the 3M Littmann Electronic Stethoscope Model 4100WS has been the head of the class in electronic stethoscopes. And now it has graduated to an even higher level with the addition of Ambient Noise Reduction Technology (ANR). Its features include programmable volume settings, 3 frequency modes, recording, storage and playback on six distinct tracks, instant playback of recordings at normal and half speed. It permits infrared transmission of digital data. The two AAA alkaline batteries provide for 20 hours of continuous use with an automatic power shutdown after 3 minutes from last button activation. It includes a nonchill diaphragm and Littmann Snap Tight Soft-Sealing Eartips. Latex and PVX free. Black only.
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