diamond jewelry tool kit portable gemstone tester selector test gold pen diamond tester diamond tester Features: With a highly compact design for fast, accurate and safe diamond testing, our diamond tester is ideal for taking your diamond with you when you buy it. This diamond tester will indicate whether your diamond is real or fake. You can quickly and easily understand diamond data. The LED light and audio of this diamond tester indicate the true and false results of the test diamond. This diamond tester is a precision electronic instrument, the operating environment is 5-35 degrees Celsius, and the relative humidity of the air is 80%. The gemstone to be tested must be clean, dry and at room temperature. The diamond tester is non-destructive and easy to operate. Notice: 1. Power on the diamond tester and heat the probe. It typically takes 20 seconds for the hot needle to contact the sample surface. 2. According to the signal sent by the thermal conductivity meter, it can be judged whether the sample is diamond. Diamond Tester Specifications: Type: Diamond Tester Diamond Tester Material: Plastic + Metal Diamond Tester Color: Black Diamond Tester Size: Approx. 160x40x22mm / 6.3x1.6x0.9 inch Diamond Tester Power Supply: Powered by 9V Battery (Not Included) Package Includes: 1 X Diamond Tester1 X Bag 1 X Test Tray 1 X User Manual