This next-generation ultimate tester for diamond fraud protection features enhanced moissanite testing technology for low conductivity stone identification. This innovative Gemoro tester has the sleekest ergonomic shape available that comfortably rests in and on your hand when held. It has intuitive finger grip pads for increased user-friendliness and ease of use. LED stone illumination and UV fluorescence detection. Precision retractable probe-tip with enhanced durability and indestructible polycarbonate housing with molded rubber base for increased impact resistance if dropped. It features a super-fast 10 second warm-up time plus a user programmable talking (English German Italian Spanish French Russian Chinese Japanese and Arabic) or ringtone sounds and glowing light bar/probe tip for quick stone identification (Green = Diamond Blue = Moissanite Yellow = Sapphire and Red = Metal Alert). It even has a metal alert warning feature that informs you if the setting is touched plus an auto-off function if accidentally left on. It can easily identify genuine sapphire watch crystals too. Includes a next-generation low-profile Gemoro Ultradock 3 charging station adjustable handy Gemoro Test Stone Magnifier attachment loose stone holder multi-voltage AC adapter and comes stored in carbon-fiber style carrying case. Powered by a Micro USB or with its included rechargeable NiMH batteries (user may substitute 3-AAA alkaline batteries if desired). An unprecedented 10-year probe tip warranty and lifetime limited replacement warranty on the unit. Designed in the USA.