Introducing our most advanced stethoscope yet  with up to 40x amplification (at peak frequency  versus analog mode)  active noise cancellation  in-app sound wave visualization; Soft-Sealing Ear Tips  Multiple Listening Modes  Connects to Eko Software  and an angled headset that aligns for a proper fit with your ear canals and a chestpiece you can hold the way you want to * Approximate Length 27 /69cm * Warranty 2 years * Diaphragm Tunable (2) * Approximate Chestpiece Diameter Double-sided; Adult side 1.7 /4.3cm; Pediatric side 1.4 /3.4cm