3M Littmann Cardiology IV Black 27 Stethoscope Wheelchairs Accessories Air Discharge: Full automatic rapid Select Ear:Left Ear Air Discharge: Full automatic rapid exhaust mode Lateral Rotation and True Low Air Loss in a portable system * 18 independent 9 deep air cells reduce interface pressure for the prevention and treatment of Stages I IV pressure ulcers * Lateral Rotation Therapy reduces the risk of pulmonary complications for patients who are immobile * Dual mode turning radius featuring a 25 degree small turn and a 40 degree big turn * User friendly controls and ease of set up make this system ideal for institutional use and the homebound patient * Designed to fit all standard hospital beds and includes a convoluted foam base head bolster and abduction wedge for additional patient safety * Supports patient weights up to 650 Lbs 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