The outstanding acoustics of our cardiology-grade stethoscope sound even better with up to 40x amplification (at peak frequency, compared to analog mode). Hearing subtle sounds to help you diagnose is now even easier.
Help cut out distracting noises common to hectic environments with our active noise cancellation technology. It can help you listen by reducing unwanted outside background noise so you can focus on listening to what’s important: your patient and their body sounds. Hear the difference
Our snap tight, soft-sealing ear tips conform to ears to create an excellent acoustic seal while providing a comfortable fit. That means you can listen confidently and comfortably.
With one button, you can quickly toggle between analog and amplified listening modes to suit your needs. Plus, its two tunable diaphragms (adult and pediatric) allow you to listen for both high and low frequency sounds without repositioning the chestpiece.
With an angled headset that aligns for a proper fit with your ear canals and a chestpiece you can hold the way you want to, the 3M™ Littmann® CORE Digital Stethoscope was designed for comfort during patient assessments.
Do more than ever before with wireless connectivity. The FDA-cleared 3M™ Littmann® CORE Digital Stethoscope works with Eko software on iOS and Android devices, giving you a HIPAA (Health Insurance Portability and Accountability Act) compliant means to save and annotate 15, 30, 60 or 120-second recordings in a secure dashboard. Create a library of heart sounds to monitor the progression of a disease or for education, or even securely share your recordings with colleagues. Plus, use Eko Artificial Intelligence to aid in the detection of heart murmurs (subscription required; available in a selection of countries only).
Download the app
Read the latest Littmann Stethoscope blog articles
An error has occurred while submitting. Please try again later...
Your form was submitted successfully
When the 3M Littmann CORE Digital Stethoscope is off, it functions as a mechanical (analogue, not amplified) stethoscope. To turn the 3M Littmann CORE Digital Stethoscope amplified mode on, press the power toggle in. The LED light will begin flashing. You will now hear amplified and filtered sound in the eartips.
The CORE digital unit LED light provides information about the status of the device:
(You do not need to pair Bluetooth® with the app for the amplification to work. You need to pair with the app to view sound wave visualisation and use features such as sound recording, sharing, and AI-enabled screening.)
(Note: The CORE digital unit will not function while it is charging.)
Ensure you are listening with the diaphragm on the active side of the chestpiece. Only one side of the chestpiece is acoustically active at a time, identified by a mark on the stem. Rotate the chestpiece to change which side is active.
Before placing the eartips in your ears, make sure they point forward, away from you. This ensures that the eartubes will align with your ear canals for comfort and maximum sound transmission.
It is also important to ensure that the fit of the eartips is creating a proper seal in the ear canals. If you are not achieving a proper seal, please perform the headset adjustment to suit your personal preference for comfort. If necessary, replace the ear tips with the smaller size that were provided in the box.
See “Using Your Stethoscope” for more details.
You may be able to listen to sounds via Bluetooth® headphones by pairing your Littmann CORE Stethoscope to the Eko App on your mobile device and using the ‘Play from Headphones’ feature in the Eko app on your mobile device and then listening live via Bluetooth® through the app. The Littmann CORE Digital Stethoscope does not pair directly with Bluetooth® wireless headphones.
If using the Eko App and external speakers or headphones to listen live, we recommend using plug-in speakers or headphones for best sound quality. Wireless headphones may yield varied sound quality, see more information here.
App version released in March 2022 in the United States: When the stethoscope is connected to the app, the filters can be selected by going to Menu -> App Settings -> CORE Audio Filter in the Eko mobile app, without any need to touch the stethoscope. The default filter is Wide but Cardiac and Pulmonary filters can also be selected to allow the lower and higher frequencies to be emphasized in the sound profile, respectively. Your filter choice will be saved when you turn the app off.
Other versions: When the stethoscope is connected to the app, the filters can be selected from the Settings menu in the Eko mobile app, without any need to touch the stethoscope. The default filter is Wide but Cardiac and Pulmonary filters can also be selected to allow the lower and higher frequencies to be emphasized in the sound profile, respectively.
If possible, perform auscultation in a quiet environment. While the Littmann CORE Digital Stethoscope has active noise cancellation, some environmental noise will still be audible during auscultation.
3M tunable diaphragm technology lets you hear different frequency sounds by simply adjusting the pressure on the chestpiece. Hold the chestpiece with light pressure on the patient’s chest to hear low frequency sounds; press a little more firmly to hear higher frequency sounds. If using the Eko App and external speakers or headphones to listen live, we recommend using plug-in speakers or headphones for best sound quality. Wireless headphones may yield varied sound quality, see more information here.
The 3M Littmann CORE Digital Stethoscope cannot pair directly with hearing aids. However, if your hearing aids are Bluetooth® compatible and can connect to your phone, you can utilize the ‘Play from Headphones’ feature in the app to stream sound wirelessly into the hearing aids from the phone. It is vital that you validate with your audiologist that your hearing aids can produce the necessary frequencies to perform a diagnostic auscultation. Find more information here.
App version released in March 2022 in the United States: The 3M Littmann CORE Digital Stethoscope includes active noise cancellation that can be turned off or on through the Menu -> CORE Settings in the Eko App. The default setting in the app is OFF. Also, turning the stethoscope off will turn off active noise cancellation.
Other versions: The 3M Littmann CORE Digital Stethoscope includes active noise cancellation that can be turned off or on through the Settings menu in the Eko App. The default setting in the app is OFF. Also, turning the stethoscope off will turn off active noise cancellation.
App version released in March 2022 in the United States: In the Eko App, tap “Patients.” Then select the patient and then the recording. Finally, tap “Share” and follow the prompts. The recipient does not need to have an Eko account to receive and open these files.
Other versions: In the Eko App, go to “Patients” > “Select patient” > “Edit”, and tap “Share patient”. You may then enter the recipient’s email address and the sound recordings will be sent to them. Note that the recipient must also have an Eko account to see shared patient recordings.
Charge your 3M Littmann CORE Digital Stethoscope or CORE Digital Attachment when the yellow light starts blinking. Insert the supplied micro-USB cable into the USB port of the device and plug the other (USB-A) end into a UL-certified USB wall charger (max 5 volts). The device LED will turn solid yellow, signifying that it is charging. The LED will change to solid green when the device is fully charged.
To fully charge the battery, it should take about 2.5 hours when starting from a fully depleted battery. When fully charged, the stethoscope should provide 8 hours of continuous digital use. We recommend turning the digital unit OFF between each use to maximise battery life.
NOTE: The digital unit will not turn on while it is plugged in and charging. There are no user-serviceable parts in the digital unit, and it is not designed to be opened by the user.
The digital unit has a 5-minute standby mode to conserve battery life. The white LED on the unit will disappear when the digital unit goes into standby mode and the toggle will remain flat with the surface of the volume buttons (i.e., in the “ON” position).
To power the digital unit back ON, push the toggle to the OFF and then the ON position. The white light will appear to indicate the device is ON.
To connect with service and support in the USA for the Littmann CORE Digital Stethoscope, please visit littmann.com/service or call 1-800-228-3957. Press option 1 for Littmann, then option 2, then option 1 for 3M Littmann CORE Support.
If you are outside of the USA for the Littmann CORE Digital Stethoscope, please visit littmann.com for the contact information of your local 3M office.
In Europe, the Middle East, or Africa for the Littmann CORE Digital Stethoscope, contact your local 3M office or email 3M.email@example.com
In Canada for the Littmann CORE Digital Stethoscope, please email CAService@mmm.com or call 1-800-268-6235.
Globally for the CORE Digital Attachment or any question about the Eko App management, please visit support.ekohealth.com.
Clean external parts between patient exams using 70% isopropyl alcohol wipes. Under normal conditions, it is not necessary to remove the CORE Digital Attachment from the stethoscope during the cleaning procedure. The diaphragms, non-chill bell sleeve, and eartips may be removed, if necessary, for thorough cleaning. Ensure all parts and surfaces are dry before reassembly. To remove an eartip, grasp the eartip firmly using the thumb and forefinger of one hand and pull sharply away from the eartube while holding the eartube in the other hand. To attach the eartips, push the small side firmly onto the eartube until it snaps fully into place. To prevent ear canal injury, be sure eartips are firmly attached to the headset before inserting them into your ears. To prevent stethoscope damage, do not: immerse your stethoscope in any liquid, subject your stethoscope to any sterilisation process (e.g., autoclaving, liquid chemical sterilisation), or store in extreme heat.