High-Precision Diamond Tester, Jewelry Diamond Tester, Professional Diamond Identifier, Diamond Testing Kit High-Precision Diamond Tester, Jewelry Diamond Tester, Professional Diamond Identifier, Diamond Testing Kit Product Features: Easy to use. LED light and sound indicate results. If the gemstone is a genuine diamond, a red light illuminates and an sound alerts. Easily calibrates gemstones of different sizes. Accurate and reliable readings. Equipped with a loose diamond testing platform. Lightweight and portable, comes with a convenient carrying case. Detailed user manual included in the package. Maintenance and Repair: 1. The instrument is very sensitive to the probe and must be handled with extra care. It should not be worn over a sleeve during use. 2. A very dim preparation indicator light indicates that the battery is about to run out and should be replaced promptly. 3. Remove the batteries when the instrument is not in use for an extended period. 4. To ensure accurate testing, it is recommended to perform calibration annually. Specifications: Color: Black Material: ABS Power Supply: 1* DC 9V Battery (not included) Product Dimensions: 14*4*2cm (6.6*1.6*0.8in) Package List: 1* Diamond Selector 1* Testing Platform 1* Carrying Case 1* User Manual