Love your stethoscope. The compact and sensitive Littmann Classic III stethoscope is the perfect instrument for clinicians who monitor and assess children or adults in non-critical environments. Manufactured with strong yet lightweight materials for hours of comfortable use. Education at your fingertips. Get exclusive training content on your mobile device that will help you improve your auscultation skills and use your stethoscope more effectively. The 3M Littmann Learning Institute App includes self-paced lessons with heart and lung sounds, patient scenarios to help improve your diagnostic thinking, self-tests to track your progress, a sound library, and more. Get the app and start training today Here's how: Find Find the Littmann Learning Institute App in the App Store or Google Play. Download the free app to your mobile device. Unlock Enter the serial number, found on your 3M Littmann Stethoscope chestpiece, or voucher code to unlock unique educational content.