LED light and audio result indication. Red light will be displayed and audio indicator sounds if the stone is a real diamond.<br><br>Simple calibration for stones of different sizes. Accurate and reliable reading.<br><br>Light weight, matched with a convenient carrying case. Detailed user manual included in the package.<br><br>The thermal conductivity meter is designed and manufactured according to the thermal conductivity of diamond. It is specially used to identify real and fake diamond.<br><br>Tips: Gemstones should be clean, dry and at room temperature. During the test, transferred to the first or second grid.<br><br><br><br>V2 Gold Test Kit with Gemstone Pen, Handheld Electronic Diamond Tester with LED for Diamonds, Sapphires, Rubies, Crystal, Agate, Jade, Gems, Hardness Testing Tool<br><br><br><br>Features:<br><br>Easy to use.<br><br>LED light and audio result indication.<br><br>Red light displays and audio indicator sounds if the stone is a real diamond.<br><br>Simple calibration for stones of different sizes.<br><br>Precise and reliable reading.<br><br>Corresponds to a test platform for loose stones.<br><br>Light weight, matched with a convenient carrying case.<br><br>A detailed user manual is included in the package.<br><br>Features:<br><br>Color: black.<br><br>Power supply: 1 DC 9 V battery (not included).<br><br>Dimensions: 16 x 4 x 2.2 cm.<br><br>Maintenance and repair:<br><br>1. The instrument is very sensitive to the probe, should be particularly careful to protect, do not use should be placed on the sheath.<br><br>2. The preparation of the indicator light is very dark, indicates that the battery will be exhausted, should be replaced in a timely manner.<br><br>3. The instrument is not used for a long time, please remove the battery.<br><br>4, in order to accurately detect, the correction proposed once a year.<br><br>Tips:<br><br>The thermal conductivity meter 1 is designed and manufactured according to the thermal conductivity of diamond. It is specially used to identify real and fake diamond.<br><br>2 instruments for precision electronic instruments, the use of the environment for 5-35 degrees Celsius, the relative air humidity at 80%.<br><br>3 stones must be clean, dry and at room temperature.<br><br>4 When testing, transfer to the first or second grid.<br><br>Content:<br><br>1 Diamond Selector II.