Littmann Electronic Stethoscope Model 4000WS This powerful, state-of-the-art electronic stethoscope provides superior acoustics. With amplification up to 18 times greater than the most advanced conventional Littmann® stethoscopes, the Model 4000WS is specially designed to pick up difficult-to-hear heart and other body sounds. Three frequency modes are available for optimal heart and lung auscultation: Bell, Diaphragm and Extended Range. The 3M™ Littmann® Electronic Stethoscope Model 4000WS offers recording, storage and playback capabilities on six different soundtracks. Instant playback is available at normal and half speed. Additionally, the Model 4000WS provides infrared data transmission of recorded sounds to either another Model 4000WS or an IBM-compatible PC, giving you the option of sharing or storing the sounds. Other features include digital signal processing over the entire acoustic range, built-in display for easy viewing of the heart rate, patient-friendly nonchill rim, and patented 3M™ Littmann® Snap Tight Soft-Sealing Eartips for excellent acoustic seal and comfortable fit. Plus, the Model 4000WS operates on just two AAA alkaline batteries. Benefits Eighteen times the amplification (25 dB) of the most advanced conventional Littmann stethoscope makes difficult sounds easier to hear. Filter circuitry provides three frequency response modes for optimal heart and lung auscultation:      Bell (20-200 Hz)      Diaphragm (100-500 Hz)      Extended Range (20-1000 Hz) Digital recording and storage of sounds on six distinct tracks. Instant playback at normal and half speed. Infrared transmission of recorded sounds to another Model 4000WS or IBM-compatible PC. LCD display in chestpiece, including heart rate readout. Twenty hours of continuous use from two AAA alkaline batteries (included). Excellent acoustic seal and comfortable fit with patented 3M Littmann Snap Tight Soft-Sealing eartips. Comfortably angled, anatomically correct headset. Patient friendly, non-chill rim. Chestpiece sized for adult or pediatric patients. 27" tubing length, black tubing color. One-year warranty. 3M™ Littmann® Sound Analysis Software Offering state-of-the-art amplification, processing, recording and wireless data transfer Enhanced diagnostics through more detailed analysis of body sounds Enhances and simplifies teaching Allows remote consultation Enables compliance with patient confidentiality Allows historical data archiving SEE the rhythm... See and listen to heart sounds simultaneously Save as *wav file format Share recorded sounds Display and print Adjust (zoom in and out) time and amplitude on the display screen View phonocardiogram and spectogram LISTEN to the rhythm... Playback via speakers and phones Playback in bell, diaphragm and extended range filter mode See and listen to heart sounds simultaneously SHARE the rhythm... Playback via speakers and phones Playback in bell, diaphragm and extended range filter mode See and listen to heart sounds simultaneously Display and print