Littmann Classic II S.E. Stethoscope Allow 2 weeks for delivery!!!!!!!!!!!!

The dual-frequency, "tunable" diaphragm allows the user to listen to both low and high frequency sound by simply alternating pressure on the chestpiece. Firm pressure allows the user to hear high frequency sounds. Ease off the light "skin contact" and the diaphragm lets you hear low frequency sounds (previously heard using the traditional bell).