ADC's adjustable frequency design (AFD) technology for the acoustic response of a traditional bell and diaphragm in a convenient one-sided chest-piece. Light pressure for low, bell-type frequency, firm pressure for high, diaphragm-type frequency. Sculpted chest-piece precisely CNC machined to exacting tolerances from surgical stainless steel for outstanding performance, rugged durability, and impressive ergonomics. Non-chill diaphragm retaining rim for patient comfort. Cardiology headset with large-bore stainless-steel binaurals, fixed at a 15° angle to maximize comfort and acoustic seal. Bi-lumen (dual bore) 19" PVC tubing stays soft and flexible. Adsoft Plus snap-on silicone ear-tips for the ultimate in wearing comfort and acoustic seal. Tactical model uses black anodized aluminum aural tubes. Accessory kit includes additional Adsoft Plus ear-tips and scope ID tag. Weighs 7.15 oz (203 g); weight may vary depending on finish. Overall length 27". Assembled, inspected, and packaged in the USA. Lifetime warranty