Item Type: Diamond Tester_x000D_ Material: ABS_x000D_ Applicable To: Diamond Identification_x000D_ Battery Specifications: 2 x AAA Batteries (Not Included)1EASY TO IDENTIFY THE AUTHENTICITY: Diamond jewelry tester has 2 sounds and 3 colors of light, easy to identify the authenticity of diamonds. 2NON DESTRUCTIVE TESTING: Diamond selector is non destructive, easy to operate and accurate. Portable diamond jewelry handheld tester. 3QUICK DISTINCTION: Diamond tester tool is used to quickly distinguish natural diamonds and various imitation diamonds without harming the diamonds. 4PRINCIPLE OF OPERATION: Diamond tester is designed according to the different thermal conductivity of diamonds and various imitation diamonds. 5EASY TO CARRY: Professional diamond selector is easy to operate, no need to be a professional to get the result, easy to carry.Repair and maintenance:_x000D_ 1. The instrument probe is very sensitive and must be protected with special care. Please wear a protective cover when not in use._x000D_ 2. When the indicator is very dark, it means the battery will be exhausted, and the battery should be replaced in time._x000D_ 3. If the instrument is not used for a long time, please remove the battery.1 x_x000D_ _x000D_ Diamond Tester 1 x Instruction Book 1 x Storage Bag 1 x Test Platform