3m Littman Master Card Black Stethoscope Tub Lifts With Tray & Measuring Tape Color:Red With Tray & Measuring Tape * Heavy duty steel base for improved strength and durability * Factory calibrated to ensure accuracy * Easy to clean trays and seats guarantee long lasting reliability * Rotating poise bars for dual reading of pounds and kilograms Channel 3 & 4 Electrotherapy Mode * Optional Accesorie for the following items: CHAT2763 CHAT2786K CHAT2760K CHAT2788K CHAT2793K CHAT2797K CHAT2791K CHAT2795K * Special procedures adaptor for difficult site or pediatric ausculation * Available in a selection of classic tube colors * 7 year warranty Black 27 * The ultimate acoustical stethoscope * Tunable diaphragm conveniently alternates between low and high frequency sounds without the need to turn over the chestpiece * Handcrafted sold stainless steel chestpiece * 2 in 1 tube design eliminates tube rubbing noise * Portable convenience of a single sided chestpiece * Excellent acoustic seal and comfortable fit with patented Littmann Snap Tight soft sealing eartips * Comfortably angled anatomically correct headset * Patient friendly nonchill rim and diaphragm