[Easy to Use]: Real Diamond will Emits sounds and lights >=9.[Intuitive Design]: Fake crystal, such as cubic zirconium ( CZ ), crystal, glass will be no sounds and lights [fast and safe ]: This diamond selector tester designed for quick, precise, and safe diamond testing. No harm to diamonds.[Magnification]: 60X led Magnification with batteries ( Small microscope ). For Gems, Coins, Antiques, Stamps, Reading, Inspection etc.[Note]: Please ensure that the battery temperature is higher than 10 ℃, can not test metal, save power Product Description How to use diamond tester Precautions Precautions Don't wear glovesDon't detect metalBest to measure in no wind conditionsThe operating temperature is within the range of 10-35 degrees Celsius, and the humidity is below 80%When testing diamond, your right index finger must keep touching the metal panel on the back of the tester. Package Content 1 x Diamond Tester1 x 9V battery1 x 60X Microscope1 x Protected leather bag1 x Texting Platform Precautions Don't wear glovesDon't detect metal Use Procedure Install Battery Put the 9V battery in.(incloud)After use, turn off the power. Table Initial Value Turn on the switch.Wait few seconds for the probe to heat up until Lamp on ready OK Set Initial Value Turn on the lights numbers corresponding to the indoor temperature and diamond weight.If don't know. Set 4 lights is lighting up on the scale. Vertical Contact Use probe to make 90-degree contact with the measured object.It needs little force to stop it on the diamond surface and make full contact 60X mini magnifier Item Type: Mini Microscope Pocket MagnifierMagnification: 60XBattery Type: 3 x LR1130 Button CellItem Size: 3.6 x 2.4cm / 1.4 x 0.9inch Diamond Tester 4 kinds of us Diamond Tester Rechargeable Battery Jewelers Loupe degrees of loupe 60X — 60X 40X Eyepiece size 11mm — 11mm 25mm