Feature:1. Handheld mini diamond selector II to test real or fake diamonds.2. Specially designed for quick, easy and accurate 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 sounds for you to distinguish real diamonds.5. LCD display and LED indicator to provide accurate reading.Specification:Features:Handheld mini diamond selector II to test real or fake diamonds.Specially designed for quick, easy and accurate testing without damaging the diamond.Portable electronic diamond tester can be used to test diamond, crystal, jade, gemstone, etc.It will emit audible sounds for you to distinguish real diamonds.LCD display & LED indicator to provide accurate reading.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 of the air 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*Test platform1*User manualPackage list:1*Diamond tester1*Leather case1*Test platform1*User manual