【Application】 It is a simple and practical diamond tester, not only for diamond detection experts, but also for novice diamond lovers. 【Audible alarms and readable】 It emits audible sounds to easily distinguish between readings and portable electronic devices to distinguish real diamonds from other simulated gemstones. The real diamond is indicated by a red LED and a beep. The test results are accurate, reliable and easy to read. If the stone is a pseudocrystal, a simulating object, such as cubic zirconia (CZ), does not respond. 【High precision diamond tester】 Professional Diamond Selector II displays real diamonds or fake diamonds, LCD monitors and LED displays. Compared to the second generation, sensitivity and accuracy have been greatly improved. The green indicator is displayed when the stone is a real diamond. If the user accidentally touches the metal instead of the stone, a continuous sound will sound. 【Reliable Confidence】 Non-destructive testing, does not damage the item. Automatically alerts you to low battery levels. LCD display, LEDs, emits audible sounds to easily distinguish readings, portable size, convenient to carry. This detector is just the right size and is easy to carry. 【Portable design】 Designed for fast, accurate and safe diamond testing. Non-destructive testing makes operation easy and accurate. The tester is lightweight, compact (credit card size) and easy to carry, this tester comes with a PU case and a small test platform for storing loose stones, this diamond tester has a very compact design and helps distinguish a real diamond from a fake diamond. 【 Wide application】 This gemstone testing tool is not only a diamond tester, but also a tester of many gemstones. You will notice that the gemstone is real or fake, including: diamond, sapphire, ruby, crystal, agate, jade and other gemstones of different sizes. 【Pay attention to the application】 No matter what gemstone you are testing, the probe needle and the tested item must be at a 90 angle. * When testing the diamond, the right index finger must touch the metal plate on the back side of the tester, while you do not touch the panel when testing other gemstones. * Do not test the metal. * Do not wear gloves. * Use the appropriate method to avoid errors. 【Conditions of use】 A thermal conductivity meter is a type of electronic instrument that has been designed and manufactured specifically for the thermal conductivity of a diamond. It is an electronic precision electronic instrument. The working environment is 5-35 degrees Celsius. The relative humidity is 80. The test stone must be clean, dry and at room temperature. The set includes; 1*GOLD TESTING KIT Battery: Note: 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. Sold by-dadangjia