Jewelry Diamond Tester, Diamond Tester Diamond Combo Tester Diamond Tester, for Novice and Jewelry Expert with A Pu Case (Not Included Battery)

automatic calibration Clear and easy-to-read analog panel display Portable tester can be used anywhere Use metal detection to identify common gemstone types Specification: Product name: Professional and efficient gem detector Colour: Black 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 (batteries not included in package) Battery life: 2.5 hours of continuous use using alkaline batteries (batteries not included in package) Standby time: 5 minutes from the last measurement time Analog display size: 73.5mm x 44.0mm Weight: 295 g Products include: 1 x Gemstone Diamond Tester (Battery not included in the package)

• Accurate and Reliable Testing Tool:Professional diamond tester, designed for quickly and easily distinguishing diamonds, moissanite and other man-made gemstones.
• Retractable Probe Tip:Thermal conductivity principle distinguishes diamonds, with automatic calibration function, retractable probe tip, can measure as small as 0.01 carat.
• SAFE:This diamond selection tester is designed for fast, accurate and safe diamond testing. No harm done to diamonds.
• Optimal Efficiency:Our diamond test pen is designed for your efficiency and features an intuitive pointer field so you can work quickly and efficiently.
• Power Supply:This multifunctional device comes with various power sources, making it the perfect jewelry tester. It can be powered by a USB cable and AAA batteries (batteries not included).