Specification With separate probe (s) Operating principle: magnetic induction/eddy current (F/NF) Measuring range:0-1250um/0-50mil Resolution: 0.1/1 Accuracy: ±1-3%n or ±2.5um Min. measuring area:6mm Min. sample thickness:0.3mm Battery indicator: low battery indicator Metric/ imperial: convertible Power supply: 4x 1.5V AAA (UM-4)battery Auto power off Operating conditions:0- 45℃ (32℉-104℉), ≤90%RHDimensions: 126x 65x 27mmweight: 81g (not including battery) Optional accessories: other range 0-200um to