Portable Diamond Selector II Gemstone Tester Tool Features: Easy operation. LED light and audio result indication. The red light will be showed and the audio indicator will sound “beep” 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. Specifications: Color: Black Power supply: 1 * DC006P 9V Battery Item size: 16 * 4 * 2cm (6.6 * 1.6 * 0.8in) Item weight: 62g / 2.2oz Package size: 18.5 * 5.6 * 3.5cm (7.3 * 2.2 * 1.4in) Package weight: 121g / 4.27oz Package including: 1 * Diamond Selector II 1 * Testing Platform 1 * Carrying Case 1 * User Manual