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  Indian J Med Microbiol
 

Figure 2: (a and b) The electronic stethoscope Littmann M3200 contains a large chest piece with a battery case below it. The rest of the parts are similar to the conventional stethoscope. The chest piece contains the LED display showing volume control, battery status, heart rate and a control mode to choose between bell, diaphragm, and extended mode. Not shown in picture is the Bluetooth connectivity option.

Figure 2: (a and b) The electronic stethoscope Littmann M3200 contains a large chest piece with a battery case below it. The rest of the parts are similar to the conventional stethoscope. The chest piece contains the LED display showing volume control, battery status, heart rate and a control mode to choose between bell, diaphragm, and extended mode. Not shown in picture is the Bluetooth connectivity option.