Which product design feature represented the biggest breakthrough in digital stethoscope adoption among healthcare professionals?

Digital stethoscopes represent a fascinating intersection of traditional medical tools and modern technology. These devices have transformed how healthcare professionals capture, analyze, and share heart and lung sounds, while addressing key challenges in medical diagnosis. This trivia question explores a critical design feature that revolutionized this medical device. Test your knowledge about this important healthcare product innovation!

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AI-powered sound analysis that can detect subtle abnormalities human ears might miss
Bluetooth connectivity for transmitting sounds to smartphones and EHR systems
Noise-cancellation technology to filter out ambient hospital sounds
Rechargeable battery technology eliminating the need for disposable batteries