I love how you can easily toggle back and forth between analog and digital sounds! I often use it when auscultating to compare. It amplifies sounds by A LOT and cancels outside noises making it very easy for me to hear heart and lung sounds. It’s a huge upgrade from my nursing school stethoscope! The app is also cool if you want to record sounds and lets you control whether you want to hear lungs or heart sounds better. Works great and you can really tell the difference. I was a little worried about the weight but the top part of the stethoscope is very light and it balances the bottom weight. Also need to mention that the customer service is fantastic. I bought mine 1-2 weeks ahead of a free case offer. And I wasn’t expecting them to entertain my request, but they sent me one and I couldn’t be happier!