JoanLab Digital Multi-Function Laboratory Precision Balance (100g x 1mg) (600g x 10mg), Precise Analytical Lab Scale, Self-Calibrating, Grams Ounce or Carats with LCD Display DUAL CALIBRATION MODES: measures up to 100g at a 1mg accuracy resolution and 600g at a 10mg accuracy resolution RICH IN FEATURES: including automatic calibration, AC/DC function, fault display function, overload and low battery indicators MEASUREMENT: scale calculates units in grams (g), carats (ct) and ounces (oz) for easy conversions IMMEDIATE USAGE: includes a protective shield, weighing tray, standard mass, power adapter and user manual for easy set up and use ONE YEAR WARRANTY: this JoanLab Digital Precision Dual Analytical Balance Lab Scale has a one year warranty