Presidium Adamas Diamond/Moissanite Tester Package with USB Charger Identifies diamonds, moissanites, simulants and metals instantly Accurate testing on diamonds as small as 0.02ct and diamond melee as small as 0.01ct (Optional Micro Tip Required) Retractable thermoelectric probe tip that ensures constant pressure between probe and gemstone, for enhanced accuracy Light and portable, Simple and easy to use and compatible with OMI web app Includes Presidium Adamas Tester as well as a 100-240V USB Charger