1Diamond tester is a portable electronic device for distinguishing real diamonds from other simulated stones. 2It is designed for quick, precise, and safe diamond testing. 3Nondestructive testing, simple and accurate operation. 4Highly compact design and light weight, easy to carry. 5This LED diamond tester will indicate the result whether your diamond is genuine or fake. Features: Diamond tester is a portable electronic device for distinguishing real diamonds from other simulated stones. It is designed for quick, precise, and safe diamond testing. Nondestructive testing, simple and accurate operation. Highly compact design and light weight, easy to carry. This LED diamond tester will indicate the result whether your diamond is genuine or fake. Specification: Condition: 100% brand new Color: Black Power: DC 9V battery (NOT included) Package List: 1 x Diamond Tester 1 x Belt 1 x Gasket Note: 1. The working environment is 5-35, the relative humidity of the air is 80%. The tested gem must be clean, dry and at room temperature. 2.Please note that the new type and old type of this product will be sent andomly, and make sure you will not mind before ordering.