Features:Made of quality material, which is eco-friendly and durable to use.The flashlight can directly display the light color effect under the diamond tester to assist in evaluating the quality of the diamond.The handleof ergonomic design is convenient to grip.The compact size is easy to use and portable to store.Suitable for jewelry display or identification assistance.Specification:Condition: Brand NewBattery: 2*AAA Battery(Not included)Length: Approx. 15.1cm/5.9inPackage List:1 * Diamond Tester Pen.Note:This product only has the function of lighting, and has no identification and detection function in the actual sense. However, it can be assisted to see whether the diamondis cut well and the flatness of the reflective surfaceby lighting, and then combined with the users knowledge and experience to make judgments based on the flatness of the reflective surface.