DESC: Model 3000, Hunter Green: How Ambient Noise Reduction works: The proprietary Ambient Noise Reduction (ANR) technology, internal to the chestpiece, acoustically cancels out an average of 75% of distracting room noise, greatly enhancing overall utility. This acoustic canceling effect is different from electronic filtering, which may also filter out some portions of body sounds clinicians need to hear. Unique Design: Because of the unique design of its diaphragm and sensor, the Model 3000 can be used comfortably on all body types and sizes. The versatile chestpiece can accommodate infant, pediatric and adult patients, and it is ergonomically designed for easy hand manipulation and patient comfort. Features of the Littmann Electronic Stethoscope Model 3000: Amplification is up to 18 times greater than the best non-electronic stethoscopes. Ambient Noise Reduction (ANR) technology. Ergonomic, one-button control allows you to adjust volume and frequency mode with one finger. Traditional cardi