Precision, one hundredth of a gram: I tested with a weight of 2 g, it displays 2.00, sometimes 1.99, or 2.01 but often eventually stabilizes at 2.00, so I feel that it is in the margin of tolerance.
The UNIT key changes of Units: gr (gram), CT (carat), dwt (pennyweight), gn (grain), OZ (avoirdupois ounce) OZT (Troy ounce) tl (tael)
It can be recalibrated, and it also has parts if such units are recorded ...