Feature●【Professional Diamond Tester】 This diamond tester pen is equipped with high-tech chip, it can effectively distinguish natural diamond in 1 second●【UV Light】 The UV light on the diamond tester is used to test the fluorescence color and intensity of diamonds, aiding in the authentication and quality assessment of the diamond.●【Operation Procedures】Hold the electricity conductive panel of the diamond meter and ring setting(or metal plate) while testing, the probe of diamond tester should be 90-degree vertical to the diamond●【Light&Buzzer Alarm】The Diamond Tester has 25 seconds warm-up time after powering on, the red indicator will flash and the buzzer emits regular rings once detecting real diamond●【ONE YEAR WARRANTY】 DANOPLUS diamond tester has one year warranty promise, please contact us if you have any issue of your diamond testerDescription