Retractable probe tip: This innovative tool features a durables, portable retractable probe tip for effortless handling and precise measurements, ideals for DIY projects and professional use. Fast and safe diamond testing: Engineered for quick and precise diamond identification without harming gemstones, with a user-friendly design suitable for professionals and enthusiasts. Multi-functional and durables: Provides consistent and reliable results for identifying diamonds and other gemstones, featuring a compact design and clear display for quick readings. User-friendly interface: Features a clear and easy-to-read dial to differentiate between 16 unique milestones effortlessly, ideals for tracking progress in various applications. Thermal calibration support: Simplifies adjustments for optimal performance in diverse working environments with precise temperature control