Gemstone II Diamond Selector Hardness Tester Gemstones with LED Indicator for Jewelry Testing

feature:
easy to use.
LED lights and audio result indication.
If the stone is a real diamond, a red light will show and an audio indicator will sound.
Simple calibration of stones of various sizes.
The readings are accurate and reliable.
Supporting bare stone testing platform.
Lightweight and comes with a convenient carrying case.
A detailed user manual is included in the package.

Specification:
Colour: Black
Power supply: 1 * DC 9V battery (not included)
Item size: 16 * 4 * 2.2 cm (6.6 * 1.6 * 0.8 inches)

Maintenance and Repair:
1. The instrument is very sensitive to the probe and must be protected with special care. It should be put on the sheath when not in use.
2. The indicator light of the device is very dim, indicating that the battery power is about to run out, and the battery should be replaced in time.
3. If the instrument is not used for a long time, please take out the battery.
4. In order to detect accurately, it is recommended to calibrate once a year.

Kind tips:
1 The thermal conductivity meter is designed and manufactured according to the thermal conductivity of diamond. It is specially used to identify the authenticity of diamonds.
2 The instrument is a precision electronic instrument, the operating environment is 5-35 degrees Celsius, and the relative air humidity is 80%.
3 Stones must be clean, dry and at room temperature.
4 When doing experiments, adjust to one or two grids.

Package Included:
1 * Diamond Picker II
1 * test platform
1 * Suitcase
1 * User Manual