Features: 1. This product can select the moissanite from the real diamond. 2. Non-destructive testing, do not hurt your item. It will automatically alarm if the battery is too low. 3. Portable size, convenient for carrying. 4. Easy to operate and accurate test. Specification: Material: Plastic Color: Shown As Pictures Size: Approx. 2.2 * 4 * 16cm / 0.87 * 1.57 * 6.3inch Weight: 156g Battery: 9V (Not Included) Type: Jewelry Tools Package List: 1 * Moissan Tester 1 * Tray 1 * Manual (Chinese English Indian 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.