Feature:1. Handheld mini diamond selector II for testing real or fake diamonds.2. Specially designed for quick, easy, and precise testing without damaging the diamond.3. Portable electronic diamond tester can be used to test diamond, crystal, jade, gemstone, etc.4. It will emit audible beeps to help you distinguish real diamonds.5. LCD display and LED indicator to provide accurate readings.Specification:Features:Handheld mini diamond selector II for testing real or fake diamonds.Specially designed for quick, easy, and precise testing without damaging the diamond.Portable electronic diamond tester can be used to test diamond, crystal, jade, gemstone, etc.It will emit audible beeps to help you distinguish real diamonds.LCD display and LED indicator to provide accurate readings.Specifications:Power supply: DC 9V Battery × 1 (not included)Material: Alloy, PlasticColor: BlackItem weight: 66g/2.3ozPackage weight: 130g/4.6ozItem size: 16*4*2.3cm/6.3*1.6*0.9inNote:1.The thermal conductivity meter is an electronic instrument specially designed and manufactured according to the thermal conductivity of diamonds to identify the authenticity of diamonds;2.The tester is a precision electronic instrument, the operating environment should be 5-35 degrees Celsius, and the relative humidity should be below 80%;3.The diamond to be tested must be clean, dry, and at room temperature.Package list:1*Diamond Tester1*Leather Case1*Testing Platform1*User ManualPackage list:1*Diamond Tester1*Leather Case1*Testing Platform1*User Manual