Medical Identification Jewelry Necklace Blank Casting Supplies 5 x 13 * 350 HERH6036TW 5 x 13 * 350 lb 160 kg capacity measured in 0 *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 Blank necklace * Stainless steel medical identification jewelry * Necklace: 24 Long * Engraved Symbol *