Working power: DC9V battery (not included) <br>Weight:165g <br>Overall dimensions: 160*40*22mm1、The thermal conductivity meter is based on the thermal conductivity of diamonds designed and manufactured, specifically for the identification of genuine and false diamonds an electronic instrument. <br>2、 <br>The instrument for precision electronic equipment, the use of the environment for the 5-35 degrees Celsius, air relative humidity at 80%. <br>3、 <br>The gemstones to be tested must be clean, dry and at room temperature. <br>4、 <br>Pocket portable handheld. <br>5、 <br>Non-destructive testing, simple and accurate. 6、 <br>Instructions: 7、 <br>Open the thermal conductivity meter power supply, the probe heating, generally takes 20 seconds. 8、 <br>The hot needle touches the sample surface, according to the thermal conductivity of the instrument can determine whether the signal is diamonds tested samples.*DIAMONDS <br>1. Beeping sound (beep-beep-beep) <br>2.（1）1~4 of the Red Lamp box OF the Level Meter，（2）will light on. <br>(More no. of Red Lamp boxes will light up for bigger sized stones.) <br>*DIAMOND SIMULANTS(Except Synthetic Moissanite) <br>1. No Beeping sound. <br>2. No Red Lamp boxes will light on. Green and/or up-to Yellow Lamp boxes may light on depending on the type of stimulants.) <br>*METAL ALERT <br>1. Continuous buzzing sound. <br>(The thermal conductivity of the metal is very high and can give the same indication as a Diamond with most Thermal Probes. <br>The Diamond Selector II has a Metal Alert buzzer to warn you when the Probe tip touches metal.) <br>If you hear the Metal Alert buzzing sound. re-touch the Probe tip so as to touch only the tested stone.1 x Diamond selector II tester<br /> <br>1 x 60 times magnifying glass<br /> <br>1 x Protected leather bag<br /> <br>1 x Texting Platform<br /> <br>1 x User manual<br /> <br><br /> <br>&nbsp;