3M Littmann 3100 Electronic Series Stethoscope Black Tube 27 in. Length

The Model 3100 electronic stethoscope picks up sounds, such as heart and lung sounds, from a patient's body. After amplification and filtering, the sounds are sent to the user through a binaural headset. Its chestpiece is designed for use with adult, pediatric, and infant patients. The user interface for the stethoscope includes a 5-button keypad and an LCD display. Sound processing is carried out with the aid of a digital signal processor. Stethoscope power is provided by a single AA battery in the chestpiece. A power management system is included to prolong battery life. Proprietary Ambient Noise Reduction (ANR) technology reduces on average 85% of unwanted background noise
Up to 24X sound amplification
Power on/off, bell/diaphragm/extended range frequency, and (+) and (-) buttons to adjust sound level up or down
LCD interface advises you of current sound level, and if you are in bell, diaphragm, or extended range frequency mode
3M Littmann patented soft-sealing ear tips in 2 sizes
Stethoscope stays in battery-saving "sleep mode" until you start your next auscultation
Operates on a single AA battery
Littmann model #3100BK
27 in. Length
Latex-free