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 ing 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 particulay 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: BlackMaterial:ABSPower supply: 1 * DC 9V Battery (not include)Package Included:1 * Diamond Selector II1 * ing Platform1 * Carrying Case1 * User Manual Origin:Mainland China Model Number:GJ214 Display Type:Analog Certification:None