Feature Measuring range:0~1500m/0~59mil/0-1.5mm Resolution : 0.1m(<100um)/1m(>100um)/0.1mil/0.001mm Measurement error:<=150um 5um >150um (3%H+1m) Min.diameter of magnetic substrate: 12mm Min.thickness of magnetic substrate: 0.5mm Min.curvature radius of convex substrate:2mm Min.curvature radius of concave substrate:11mm Min.diameter of non-magnetic substrate: 50mm Min.thickness of non-magnetic substrate: 0.5mm Operating temperature range:0~40c Operating humidity range:10-95RH Power supply: 2*1.5V AAA battery(battery not included ) Weight: 63.98g (without battery) overall Dimension: 65*31*108mm Package List: 1xGM211 Thickness Gauge(battery not include) 1xManual 6xDifferent Size Film