The Adscope Lite 619 features: Combination diaphragm/bell adult chestpiece precisely machined from aluminum alloy Ultra-lightweight, only 3.7 oz (105 g) Extra-large 1 3/8" diameter bell and highly sensitive 1 3/4" diaphragm ADC’s AFD technology further enhances acoustic response; use light pressure for low frequencies, firm pressure for high frequencies Clinician headset boasts reinforcing yoke molded into the flexible 22" PVC tubing 15% thicker tubing (compared to Adscope 609), made without natural rubber latex or phthalates Overall length 30" 18 tubing colors and 4 satin metal finishes Adsoft™ Plus Snap-on silicone eartips Non-chill bell and diaphragm retaining rim for patient comfort Includes both large and small Adsoft™ Plus eartips and scope ID tag Individually acoustic tested and inspected in the USA Lifetime warranty and free parts forever