Compact ABS built device features a LED indicators systems and portable pen styles design for effortless single handed operate in jewelry verification tasks Essential tool for jewelers, pawnshop owners, and enthusiasts requiring on site authentication during purchases or collection evaluations Professional Tester with advanced thermal conductivity technology instantly verifies authenticity through precise heat transfer measurement Ideal for quick checks at jewelry stores, exhibitions, or home based jewelry appraisals with fast results displayed through color coded LED signals Multi functional models extend testing capabilities to popular simulants like zirconia and moissanite, making it versatile for comprehensive identification needs, Manufacturer: Greabuy