Model: CM8829S 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: 4x1.5V AAA(UM-4)battery Auto power off Operating conditions:0-+45°C(32°F-104°F),≤90%RH Dimensions: 126x65x27mm weight: 81g(not including battery) Optional accessories: other range 0-200um to 15000um