Littmann 3000 Electronic Stethoscope with Ambient Noise Reduction

Thanks to a proprietary technological advancement known as Ambient Noise Reduction (ANR), the Littmann Electronic Stethoscope Model 3000 reduces distracting room noise by an average of 75% (-12dB) without eliminating critical body sounds. Combine that with amplification up to 18 times greater than the best acoustic (non-electronic) stethoscope and you have an instrument that is uniquely equipped to help you pick up difficult-to-hear heart, lung, and other body sounds.
Acoustics:

Amplification up to 18 times greater than the best non-electronic stethoscopes
Ambient Noise Reduction Technology (ANR)
Programmable volume settings
Ergonomic, one-button control allows you to adjust volume and frequency mode with one finger

Chestpiece & Diaphragm:

Ergonomically designed for easy, one-hand manipulation
Nonchill diaphragm for patient comfort
Accommodates infant, pediatric, and adult patients

Eartubes & Tubing:

Eartubes are capped with patented 3M Littmann Snap Tight Soft-Sealing Eartips for excellent acoustic seal and comfortable fit
Traditional cardiology tube set allows scope to easily fold and be placed in pocket

Power:

Single AAA battery provides up to 200 hours (approximately 6 months) of use
Auditory low-battery warning
Automatic power shut down after 3 minutes from last button activation