3M Littmann Cardiology IV Stethoscope with Eko Core Attachment
The stethoscope and amplifier both work great, the amplifier charges and connects well via Bluetooth. There’s an app you can use to playback the sounds from the amplifier and also change the focus of the amplifier from cardiac to lung sounds to broad. If you have the app out while you’re using the stethoscope and also calculates heart rate. There a small black stain that you can see in the photos.