Description:Easy 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 ratherthan stone )Large / small switch for testing diamonds / - 8 pointsTo emit sounds to give accurate readingLCD display & LED indicatorIf stone is Fake crystal, a simulant such as cubic zirconium ( CZ ), will be no reactionDimension: 16.5 x 4.2 x 2.2cmPowered by DC 9V battery x 1 (no included )Weight: 100g(no including battery)Color: BlackSpecifications:Easy to use even for a new beginner Emit audible sounds to give accurate reading Diamond 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 points To emit sounds to give accurate reading LCD display & LED indicator If stone is Fake crystal, a simulant such as cubic zirconium ( CZ ), will be no reactionPackage Included:1*Diamond Tester (without battery)