Diamond Tester High Accuracy Diamond Tester Pen Jewelry Diamond Tester Professional Diamond Selector Diamond Tester Kit Features: Easy operation. LED light and audio result indication. The red light will be showed and the audio indicator will ring if the stone is real diamond. Simple calibration for stones of various sizes. Accurate and reliable reading. Matched with a testing platform for loose stones Light weight, matched with a convenient carrying case. Detailed user manual is included in the package. Maintenance and repair: 1, the instrument is very sensitive to the probe, must be particularly careful to protect, do not use should be set on the sheath 2, the preparation of the indicator light is very dark, shows the battery will run out, should be timely replacement battery. 3, the instrument is not used for a long time, please take out the battery. 4, in order to detect accurately, the proposed correction once a year. Specifications: Color: Black Material:ABS Power supply: 1* DC 9V Battery (not include) ltem size:14*4*2cm(6.6*1.6*0.8in) Package Included: 1 * Diamond Selector l 1 * Testing Platform 1 * Carrying Case 1 * User Manual _x000D_