3M Littmann Cardiology IV Black 27 Stethoscope B P Parts Accessories Integrative SpO2 Probe 44450 Integrative SpO2 Probe Position at a higher or lower height (use on side 1 or side 2) * Without the removable straps the deluxe wedge functions just like the standard Skillbuilders© wedge * Outstanding acoustics with better audibility of high frequency sounds (adult side firm pressure) * Tunable diaphragm: Hear high or low frequency sounds by slightly adjusting pressure on the chestpiece * Standard Finish Chestpiece Black Tube Stainless Stem and Headset * Dual lumen tubing: Two sound paths in one tube eliminates the rubbing noise of traditional double tubes * Next generation tubing lasts longer and resists stains * Not made with natural rubber latex or phthalate plasticizers * Headset is easily adjusted for individual fit and comfort * Angled eartubes align with ear canals * Seven year warranty provides greater peace of mind