Features:
1. Easy to use: Guide meter is an electronic instrument specially designed and manufactured according to the thermal conductivity of diamonds to identify the authenticity of diamonds. This instrument is a precision electronic instrument, the operating environment is 5-35 degrees celsius, and the relative humidity of the air is low. At 80%.
2. Safe: This diamond selection tester is designed for fast, precises and safe diamond testing. Harmless to diamonds. Suitable for gems, coins, antiques, stamps, reading, checking, etc.
3. Easy to use: With indicator light. Use the big/small switch to test the diamond, make a sound, and easily distinguish readings. Simple to operate, no professional required. Simply turn on our diamond test pen detector; place the tip on the gemstones.
4. Fast results: Diamond test pen is designed to provide fast and accurate results. You'll be able to know if there's a fake in seconds, and the luminous magnifying glass combo is your go-to kit for garage sales, flea markets, replacements, and more.
5. Application range: Industrial use, circuit board and printing, industry, medicine, gardening, coins, diamonds, seals, jewelry, evaluation, education, geography, home and office. It's also a great tool for testing your own jewelry.

Description:
Guide meter is an electronic instrument specially designed and manufactured according to the thermal conductivity of diamonds to identify the authenticity of diamonds. This instrument is a precision electronic instrument, the operating environment is 5-35 degrees celsius, and the relative humidity of the air is low. At 80%.

Specifications:
Material: PC
Size: 160*40*22mm
Working power supply: DC9V battery(not included)

Package Included:
1pc * Diamond Testers(without battery)

Notes:
1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding.
2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from real object.