Littmann Lightweight II SE is a basic range stethoscope that features a new oval-shaped chestpiece that allows the doctor to reach to areas that are difficult to reach when using the traditional circular chestpiece. This new design also incorporates the double-frequencies membrane developed by 3M, the comfortable non-cold rim and membrane, and the anatomical and comfortable ear tips with soft ending that helps isolate from ambient sounds. Above all though, this stethoscope is made by Littmann, a world-renown manufacturer of proven quality and a reliable pioneer in the auscultation technology.