Features: This product can select the moissanite from the real diamond.Non-destructive testing, do not hurt your item. It will automatically alarm if the battery is too low.Portable size, convenient for carrying.Easy to operate and accurate test.The instrument probe is very sensitive, bringing high working efficiency.Specification: Material: PlasticColor: Shown As PicturesSize: Approx. 2.2 * 4 * 16cm / 0.87 * 1.57 * 6.3inchWeight: 156gBattery: 9V (Included)Type: Jewelry ToolsPackage List:1 * Moissan Tester1 * Tray1 * Manual (Chinese English Italian Japanese)Note:1. The items you test shoudler be clean, dry, and at room temperature. Or it will cause false detection.2. The probe is very sensitive and should be protected with a cover when not in use.3. Low power should be replaced in time.4. Remove the battery if it is not used for a long time..