Hyuduo Gemstone Tester, USB Rechargeable Portable Thermal Conductivity

Spec: Item Type: Gemstone Tester Material: ABS Weight: Approx. 140.00g / 4.94oz Working Temperature: 10-40℃ Product Size: Approx. 158x46x22mm / 6.22x1.81x0.87in Data Cable Plug: Type C Built in Lithium Ion Battery: Model , Capacity 500MAH Package List: 1 x Gemstone Tester 1 x Connecting Cable 1 x Accessory 1 x Instruction Manual How To Use: 1. Preheat the device for 30 seconds after turning it on. 2. The device will automatically shut down if not in use for 10 minutes while turned on. 3. When holding the device, be sure to touch the conductive plate on the back with your fingers (correct measurement cannot be taken without touching the plate). 4. Refer to the instruction manual for further details.

• [HIGH ACCURACY THERMAL CONDUCTIVITY] This gemstone tester pen utilizes advanced thermal conductivity technology to accurately distinguish between genuine gemstones and imitation stones, giving you reliable results every time you test. Whether you are a professional or a hobbyist, this tool ensures precision in gemstone identification.
• [PORTABLE AND CONVENIENT DESIGN] Compact and lightweight, this portable gemstone detector easily fits into your wallet or backpack, making it perfect for on-the-go use. Its simple operation allows you to test loose or mounted gemstones, jewelry, and precious metal products quickly and efficiently.
• [AUDIO AND VISUAL PROMPTS] Equipped with both a light indicator and an audible sound, this gemstone detector provides clear feedback to help you differentiate between real gemstones and ordinary stones. The prompt system makes testing intuitive and easy, even for beginners.
• [SIMPLE ONE BUTTON OPERATION] Just place the probe vertically on the object being tested and press the switch to get results. The USB rechargeable design with a built-in 500mAh lithium battery ensures long-lasting use, while the Type C data cable offers convenient charging.
• [TESTING GUIDELINES FOR ACCURACY] This gemstone tester works by measuring thermal conductivity, and for best results, avoid testing on unsuitable items like metal, skin, or water. Following the correct testing procedure ensures accurate and consistent performance, making this tool a reliable addition to your jewelry testing kit.