High-precision diamond tester pen, professional jewelry diamond tester, suitable for both beginners and experts for diamond identification

[Intuitive Design]: Our diamond tester is equipped with an LCD screen and LED indicators, making it easy for you to accurately read the test results. No professionals needed—-the diamond tester pen is simple to operate. Just turn it on, gently press the tip against the gemstone, and wait for the beep to determine whether it is real or not. [If it is a real diamond]: The professional diamond tester will light up at 9 o'clock and emit an audible sound. No response means the gemstone is a fake crystal or imitation, such as cubic zirconia (CZ). [Manual Operation]: All tests must be performed manually. If you wear gloves, the metal alarm will not work because the operation requires normal hand moisture. All tests must be carried out with both hands, one hand holding the diamond, and the other hand holding the diamond tester. As for the hand holding the diamond tester, you must touch the conductive panel on the back of the device. If you test a diamond with only one hand, the result will be incorrect. [Startup Beep]: Ensure the tester pen's battery is correctly installed and fully charged. Additionally, clean the tester pen probe; keeping it clean helps improve testing performance. The beep at startup indicates that initialization is needed. Please refer to the chart on the back of the device for specific initialization settings based on diamond temperature and size. Adjust the initial number of lights using the knob (the default setting is to light 4 LEDs at room temperature). [High-Frequency Sound During Metal Testing]: The high-frequency sound during metal testing comes from the working principle of the tester pen, which relies on thermal conductivity to distinguish diamonds from fake gemstones. Since metals have thermal conductivity similar to diamonds, high-frequency sounds are produced during testing. [Professional Diamond Selector]: After turning on, rotate the dial to keep 4 green lights on to complete initialization. Otherwise, you will get inaccurate results. For diamond simulants: no sound and no red lights turn on. [Note]: This diamond tester cannot distinguish moissanite from diamonds because the product works by measuring the thermal conductivity of objects. Moissanite has thermal conductivity almost identical to diamonds.