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.