Diamond Teste+2pc 30X Magnifying Glasses is a portable electronic device for distinguishing real diamonds from other simulated stones. It is designed for quick, precise, and safe diamond testing. Operation method: 1.Turn on the power, the power indicator is on, the instrument starts to warm up, and the instrument can be used in a few seconds.(after the lamp on ready ok ). 2. Put the measured bare drill into the appropriate concave hole of the support tray, and put its table top up. The inlaid ones need not be placed in the tray hole, but can be held by hand. 3.According to the weight of the diamond to be measured and the temperature of the measuring environment, turn on exact light-emitting diodes according to the manuals. 4. Pay close attention to the reflection of the instrument. If the remaining yellow light-emitting diodes are on, when they are on to nine diodes, accompanied by a beep, it indicates that the tested person is a real diamond. On the contrary, if less than 9 and the instrument does not give out a sharp sound, indicating fake diamonds or counterfeit goods. Features: Color: Black LED light and audio result indication,Accurate and reliable reading Metal alert,Simple calibration for stones of various sizes Testing Capability: Diamonds, Diamond simulation (e.g. CZ), Metal. Dimensions: 6.5 x 1.5 x 0.75 (Depth). Weight: 5 Oz Initial warm-up time: 20 sec. Indicator: Audio and LED lamps 30X 21mm Microscope Magnifying Glasses The pocket size is convenience to carry, you can use it in everywhere and every time.Compact Design Provides 30X Magnification.For Gems, Coins, Antiques, Stamps, Reading, Inspection etc. Color: Silver. Lens Material: Glass. Weight: 51g Colour: Silver Lens diameter: 21mm. Package include: 1 x Diamond Tester 2x 30X21mm Jewelry Magnifier