*Retail boxed w/fitted foam inside * Amplifies up to 16x (24db) over traditional acoustic scopes * Patented piezopolymer film contact microphone provides wider frequency response than acoustic mikes used in competing models *Three frequency modes: -Bell (15-200Hz) for cardiac sounds -Diaphragm (100-500Hz) for lung sounds -Extended Range (15-1000Hz) *16 level volume control * Holds last mode and volume setting for convenience *Auto-shut off after 3 minutes extends battery life *Battery warning LED signals when replacement needed *Binaurals fixed at 15ß angle for snug fit *Specially constructed ADSOFT⁄ PVC eartips * Weight: under 6 oz measures just 28 * Uses ÀAAAÃ battery (included) * Made in Korea * 2 year warranty