Mastisol® Liquid Adhesive, 15 mL, 1 Each Electronic Stethoscopes Key lock mechanism Style:1 Pair (Left & Right) Key lock mechanism *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 It can help reduce slippage of surgical dressings spontaneous or accidental extubations and dislodged IVs