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