Features: The diamond tester is a portable electronic device designed to differentiate genuine diamonds from other synthetic stones. It facilitates quick, accurate, and safe testing of diamonds. Nondestructive testing with simple and precise operation. Compact and lightweight design for easy portability. This LED diamond tester provides clear indications of whether your diamond is authentic or imitation. 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 temperature range is 5-35°C, with relative humidity at 80%. The gem being tested should be clean, dry, and at room temperature. 2. Please be aware that the product may be sent in either the new or old version at random, so make sure you are okay with this before placing your order.