The Littmann CORE Digital Stethoscope will go into standby mode after 5 minutes of inactivity. To turn the device back on, toggle the power off and back on.

Download the Eko App from the Apple App Store® or Google Play™ Store, start the app, and create an Eko account. Turn on Bluetooth® on your phone or tablet, launch the Eko App, and turn on the Littmann CORE Digital Stethoscope. Then pair the stethoscope with your device as instructed in the app.

Yes, English and Japanese are available on all platforms. Spanish, German, French, Portuguese, and Italian are available now on Android™ and will be available on iOS in the future. More languages will be added to both platforms in the future.

There is no data stored in the app. The app acts as an interface between the web platform and your data. Eko’s app is a cloud-based software with all data stored in the cloud within the United States. Data security is one of our highest priorities. Eko maintains HIPAA-compliant policies, procedures, and technical safeguards for patient and customer data. Eko uses HIPAA-compliant and NIST recommended 256-bit AES encryption using managed keys for patient data. Encrypted backups are taken daily. Eko’s app also meets the General Data Protection Regulation (GDPR) in the EU.

The new app is compatible with iOS version 15 or newer and will not work on iPhones using iOS 14 or older. For those using iOS 14 or older, the app will not update to the new app, but you can continue to use the previous version of the Eko app. To see a complete list of compatible Android devices, please visit the Eko Help Center.

There is no data stored in the app. The app acts as an interface between the web platform and your data. Eko’s app is a cloud-based software with all data stored in the cloud within the United States. Data security is one of our highest priorities. Eko maintains HIPAA-compliant policies, procedures, and technical safeguards for patient and customer data. Eko uses HIPAA-compliant and NIST recommended 256-bit AES encryption using managed keys for patient data. Encrypted backups are taken daily. Eko’s app also meets the General Data Protection Regulation (GDPR) in the EU.

1. Rotate to the correct side – when using the double-sided Littmann CORE Digital Stethoscope, you need to open (or index) the side you want to use—bell or diaphragm—by rotating the chestpiece. If the diaphragm is open, the bell will be closed, preventing sound from coming in through the bell and vice versa.

2. Point eartips forward - 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.

3. Choose your eartip size - for optimal acoustic performance, it’s important to use the eartip size that best fits comfortably in your ear to achieve a proper seal. Small and large size eartips are provided in the Littmann CORE Digital Stethoscope box. You may also perform a headset adjustment (as shown below) to suit your personal preference for comfort.

4. Remove potential obstructions - if you usually carry your Littmann CORE Digital Stethoscope in a pocket, or don’t clean it often, lint or dirt may accumulate and obstruct the sound pathway. To prevent debris from accumulating, give your stethoscope routine cleaning and care, and keep the open bell free of debris by covering it with the removable diaphragm.

5. Check the seal – Littmann CORE Digital Stethoscopes rely on an airtight seal in order to transmit body sounds from the patient to the practitioner’s ears. Loose parts in the chestpiece, loose or cracked tubing, or improperly seated eartips can prevent an airtight seal.

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. Please visit the Eko Help Center for more information.

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. Please visit the Eko Help Center for more information.

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. Please visit the Eko Help Center for more information.

Current version of the app: 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.

Prior versions of the app: 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.

The 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. Please visit the Eko Help Center for more information.

Current version of the app: The 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.

Prior versions of the app: 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.

Sharing auscultation sounds requires an Eko+ subscription, which is only available 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.

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 maximize 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.

The sound level can be amplified in 7 increments to provide up to 40x amplification (at peak frequency, versus analog mode) when listening with the stethoscope earpieces. Increase the volume level by clicking the plus (+) volume button on the side of the unit and decrease the volume level by clicking the minus (-) volume button on the side of digital unit.
If you are using headphones to listen to the sounds through your smart phone or tablet, you will need to adjust your device’s volume in the usual manner; the stethoscope’s volume buttons will have no effect on listening volume in this case.

Note: Changing the volume on the digital unit does not affect the volume of a recording in the Eko App running on your mobile device. Playback volume must therefore be adjusted in the App or on the smart device itself.

Yes, the stethoscope can be laser engraved. We do not recommend scratch engraving as this can increase frictional noise during auscultation. Do not disassemble the stethoscope in any way (e.g., pulling the tubing apart, unscrewing the tubing stems).

United States: With an active Eko+ subscription, when the Eko App is connected and used with a compatible digital stethoscope, the Eko Analysis Software (EAS) can automatically check for murmurs, bradycardia, and tachycardia. Once the recording is completed, the Eko App will summarize any findings, including potential murmurs or other abnormalities detected. Keep in mind that the algorithms used to detect murmurs are not accessed by an Eko device alone. Users must be connected to the EAS using the newest version of the Eko App and have an active Eko+ subscription. Reminder: the outputs of the Eko analysis are not a diagnosis but are intended to aid the clinician in reaching a diagnosis accurately, quickly, and confidently.

International: This app is available internationally, though every country has their own set of guidelines on what is and is not available to be downloaded. If you can download the new app, please be advised that AI will not be included, as these algorithms are only currently distributed in the United States. You will still have access to other Eko App features.

Eko offers telemedicine through a paid software subscription (where available, sold separately). Visit the Eko website to learn more.

The Littmann CORE Digital Stethoscope is available today in select markets in the following finishes: all black, high-polish rainbow, high-polish copper, and high-polish mirror. Please sign up to receive Littmann emails or follow us on social media to be one of the first to know when we launch new styles.

A fully charged battery should last at least eight hours in continuous transmission mode (powered on and Bluetooth® paired with the Eko App).

The battery in the CORE Digital Attachment will need to be charged before first use. A USB charging cable is provided in the box. The Littmann CORE Digital Stethoscope and the CORE Digital Attachment will take about 2.5 hours to fully charge. The light on the digital attachment will turn green when it is fully charged.

No, because the Littmann CORE Digital Stethoscope contains metal.

The tunable diaphragm is a 3M invention that allows you to listen to both low and high frequency sounds without the need to remove the chestpiece from the patient, turn it over, and reposition it.

Because the Littmann CORE Digital Stethoscope is built from a Littmann Cardiology IV™ Stethoscope, it also includes this feature. Even if the digital component is turned off or the battery is dead, clinicians still have the ability to hear many different frequencies.

By varying the pressure placed on the patient, a tunable diaphragm will adjust, or tune, the sounds to allow you to hear either low or high frequencies. When holding the tunable diaphragm on a patient and pressing lightly, low frequency sounds will be transmitted. When using the tunable diaphragm and pressing firmly, higher frequency sounds will be emphasized.

Under normal conditions, it is not necessary to remove the CORE Digital Attachment from the stethoscope during the cleaning procedure.

The tubing used on the Littmann CORE Digital Stethoscope is made of PVC (polyvinylchloride), which becomes hard when exposed for long periods of time to the lipids found in human skin. If worn around the neck, we recommend wearing the stethoscope over a collar away from contact with your skin.

Yes, we list available Littmann CORE Digital Stethoscope parts and accessories in our full product catalog. They are available to purchase from our authorized retailers. If you are in need of stethoscope service information, please visit our Littmann Warranty and Repairs page.

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