Portable LED Audio Diamond Gemstone Gems Jewelry Tester Selector Tool100% brand newEasy to use even for a new beginnerEmit audible sounds to give accurate readingDiamond indicator will be showed if the stone is a REAL diamond (Green light)Metal alert (continuous buzzing sound when user accidentally touches metal rather than stone)Large / small switch for testing diamonds +/ - 8 pointsTo emit sounds to give accurate readingLCD display & LED indicatorIf stone is Fake crystal, a stimulant such as cubic zirconium (CZ), will be no reactionDimension: 160*40*22mmPowered by DC 9V battery x 1 (Battery Not Included)Package Content:1 x Diamond Selector II Tester1 x English User Manual1 x Protected leather bag#Jewelry #DIAMOND #diamond selectortester tool #diamond tester tool #led #led indicatort #Tool #Gem #Gemstone