Combination chestpiece precisely CNC machined to exacting tolerances from ultra-lightweight aluminum alloy. Extra-deep bell for unsurpassed low-frequency response. Ultra-sensitive diaphragm for greater amplification and crisper high-frequency transmission. Cardiology headset with large bore aluminum binaurals are fixed at 15 angle to maximize comfort and acoustic seal. Bi-lumen (dual bore) 19″ PVC tubing stays soft and flexible. Adsoft threaded PVC eartips for the ultimate in wearing comfort and acoustic seal. Includes accessory kit with spare diaphragm, extra Adsoft and standard eartips. Scope ID Tag included. Weighs JUST 4.5 oz. (130 gr.). Overall length 28″. Assembled, inspected and packaged in the USA. Lifetime Warranty covers all parts.