Description: 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 reaction Dimension: 16.5 x 4.2 x 2.2cm Powered by DC 9V battery x 1 (no included ) Weight: 100g(no including battery) Color: Black Specifications: 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 reaction Package Included: 1*Diamond Tester (without battery)