Description: Material: alloy Color: silvery Size: 13.5cm/5.3inch Power supply method: 9V battery (not included) Feature: 1. It is equipped with an in-built diamond selector, providing a complete set of tools for evaluating the authenticity of various gemstones, making the operation easy and convenient. 2. This professional diamond detection kit is specifically designed for precisely and accurately detecting the diamond content in jewelry. It can provide reliable results for both beginners and experienced jewellers. 3. This detector is designed for beginners and professionals, equipped with a simple and understandable operation guide, allowing anyone to confidently assess the quality of jewelry without requiring relevant skills. 4. This diamond detector is small and lightweight, making it easy to carry and operate. It is suitable for both detection in stores and personal use at home. 5. This diamond detector is made of high-quality materials, specially designed for long-term use, ensuring that you have a reliable tool that can withstand frequent use and maintain stable performance over a long period of time. Note: 1. Based on actual usage effect. 2. Due to the difference between different monitors, the image may not reflect the actual color of the item. Package included: 1 *Hardness tester