Features: 1) Pocket with a handheld. 2) Operation simple and accurate and reliable reading. 3) Emit audible sounds to give accurate reading. 4) Diamond indicator will be showed if the stone is a REAL diamond (Green light). 5) Metal alert (continuous buzzing sound when user accidentally touches metal rather than stone). 6) Large / small switch for testing diamonds +/ - 8 points. 7) to emit sounds to give accurate reading. 8) LCD display LED indicator and audio result indication. 9) If stone is Fake crystal, a simulant such as cubic zirconium (CZ), will be no reaction. 10) Dimension: 16 x 4 x 2 cm 11) Powered by DC 9V battery x 1 ( NO Included) 12) Weight: 5 oz 13) Testing Capability: Diamonds,Diamond simulation (e.g. CZ),Metal 14) Color: Black 15) Indicator: Audio and LED lamps Package include: 1 x Diamond Tester(not include battery) 1 x Leather Pouch Case