Professional diamond testing pen, high-precision electronic for jewelry, diamond detector

Features:
Mini Portable Diamond Selector II for testing real or fake diamonds.
Specifically designed for quick, easy, and accurate testing without damaging the diamond.
The portable electronic diamond tester can be used to test diamonds, crystals, jade, gemstones, etc.
It will emit audible sounds to help you distinguish real diamonds.
LCD screen and LED indicator for accurate readings. Specifications:
Power Supply: 1 x 9V DC battery (not included)
Material: Alloy, Plastic
Color: Black
Item Weight: 66g/2.3oz
Package Weight: 130g/4.6oz
Item Size: 16 x 4 x 2.3cm/6.3 x 1.6 x 0.9in inches Note:
1. The thermal conductivity meter is a specially designed electronic instrument that uses the thermal conductivity of diamonds to identify their authenticity; 2. The tester is a precision electronic instrument; the operating environment must be between 5 and 35 degrees Celsius, and the relative humidity must be below 80%;
3. The diamond to be tested must be clean, dry, and at room temperature. Package List:
1 * Diamond Tester
1 * Leather Case
1 * Testing Platform
1 * User Manual