Professional Jewelry Tester, Automatic Calibration Portable Gemstone Tester, Suitable for Testing The Hardness of Diamonds and Jade.

Specification: Product name: Professional and efficient gem detector Technical specifications Operating temperature--18°C- 27°C (65°F- 80°F) Storage temperature---10°C- 50°C(50°F-122°F) Power supply: 3 AAA batteries or AC adapter (battery not included in package) Battery life: Alkaline batteries can be used continuously for 25 hours Standby time: 5 minutes from the last measurement time Analog display size: 73.5mmX44.0 mm Weight: 295 grams Products include: 1 x gemstone diamond tester(battery not included in package)

• Precise and Reliable Testing Tool: A professional diamond testing pen designed for quick and easy identification of diamonds, moissanite, and other synthetic gemstones.
• Highly Efficient and Convenient: Our diamond testing pen features an intuitive pointer area design to enhance your work efficiency, allowing you to complete tests quickly and efficiently.
• Fast and Safe: This diamond testing pen is designed for fast, accurate, and safe diamond testing without damaging the diamond.
• Retractable Probe: Utilizing the principle of thermal conductivity for diamond identification, it features an automatic calibration function, a retractable probe, and a minimum measurement accuracy of 0.01 carats.
• Service: If you have any questions, please feel to contact us and we will reply within 24 hours!