Features:Good Material - It consists of a solid, durable ABS body, a highly sensitive alloy probe, a protective rubber cap, and a good heat-conducting plate.Fast and Accurate Measurement - A quick, accurate, and sure way of distinguishing diamond from the simulants will not harm the diamond.Easy to Use - Turn on, wait for heating, hold (fingers on the thermal plate) and use the probe to make 90 degree contact with the test object.Intuitive Design - A beep and LED indicators show the test result directly on (beep and light: Diamond, continuous buzz: metal, no signs: Simulants).Portable Large & Leather Case - Compact, lightweight diamond tester, powered by 1 x 9V 006p battery, comes with a leather case for easy storage and carrying.Specifications:Material: Plastic + Electronic ComponentsColor: BlackProduct Dimension: 158.7*41.2*21mmProduct weight: 60g Diamond Tester Set only, other accessories in the pictures are not included. Please read the user manual carefully for more information before using. Due to lighting or other reasons, the picture and material object may be slightly different. Due to the manual measurement, there may be some deviations, please in kind.Notes:1. Due to manual measurement, please allow 1-3 cm error. Make sure you don't mind before you bid.2.Colors may vary due to different monitors, please understand.