Practical Diamond Selector Diamond Tester Gemstone Selector II Gems LED Indicator Jewel Jewelry Tool Test Jewelry Tools_x000D_ _x000D_ Description:_x000D_ 100% brand new and high quality_x000D_ specification:_x000D_ Item type: Diamond Tester_x000D_ Material: Metal, Plastic_x000D_ Color: Black (shown as the pictures)_x000D_ Size: (As picture shows)_x000D_ 13.5 x 4 x 2cm/5.31*1.57*0.79inch_x000D_ Powered by DC 9V battery x 1 ( Not included )_x000D_ _x000D_ Features:_x000D_ Easy to use even for a new beginner_x000D_ Emit audible sounds to give accurate reading_x000D_ Diamond indicator will be showed if the stone is a REAL diamond (Green light)_x000D_ Metal alert (continuous buzzing sound when user accidentally touches metal rather than stone )_x000D_ Large / Small switch for testing diamonds +/ - 8 points_x000D_ To emit sounds to give accurate reading_x000D_ LCD display & LED indicator_x000D_ If a stone is Fake crystal, a simulant such as cubic zirconium ( CZ ), will be no reaction_x000D_ Operating methods:_x000D_ 1. Open the power, the power indicator light, instrument began preheating, after a few seconds instrument can be used._x000D_ 2. Take the naked drill to be tested into support tray appropriate sunken hole, and its mesa upwards. Those already inlay need not put tray hole in, you can use hand to hold it._x000D_ 3. According to the weight of the tested diamonds and measuring the temperature place to move several bright leds._x000D_ 4. Take down needle sheath, handhold instruments, the right index finger touch the conductive plate on the back cover of instrument. To make the probe vertically and gently contact with mesa of measured diamond. _x000D_ 5. Carefully watching the instrument, if the rest of the emitting diode light reflect yellow, when light place moves to nine diodes with accompany beeping, this explains those tested are for real diamonds. On the contrary, if light place moves to insufficient nine diodes, and without accompany beeping, this explains fake diamond or counterfeit._x000D_ Quantity:1PC (No retail package) (other accessories demo in the picture is not included)_x000D_ Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!!_x000D_ Compare the detail sizes with yours, please allow 1-4CM differs due to manual measurement, thanks!_x000D_ _x000D_ Package includes:_x000D_ 1PC X Diamond Tester_x000D_ 1PC X User manual