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 simulate such as cubic zirconium ( CZ ), will be no reaction. Operating Methods: Open the power, the power indicator light, instrument began preheating, after a few seconds instrument can be used. Take the naked drill will be tested. Support tray appropriate sunken hole, and its mesa upwards. Those already inlay, need not put tray hole in, you can using hand-held its. According to the weight of the tested diamonds and measuring the temperature place move bright several LEDs. Take down needle sheath, hand-held instruments, the forefinger of conductive plate, touch instrument back cover that probe vertically and measured true diamond mesa gently contact. Carefully watching instrument, if the rest of the emitting diode light reflect yellow, when light to nine diode, accompany beeping this explains those tested for a real diamond. By contrast, if lit, and insufficient nine instrument does not send fen chirp, explain fake diamond or ape. Item Name: Diamond Tester Case Color: Black Initial Warm-up: 20sec Indicator: Audio and LED Lamps Testing Capability: Diamonds/ Diamond Simulation (e.g. CZ)/ Metal Powered by: 1 x DC 9V Battery (Included) Size: 16cm x 4cm x 2.2cm/6.30" x 1.57" x 0.87" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Diamond Tester 1 x DC 9V Battery 1 x Protective Bag 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 ).