Coating Thickness Gage, Maximum Thickness Measured 40 mil, Minimum Thickness Measured 0 mil, Thickness Measurement Accuracy +/-0.1 mil + 3 Percent, Calibration Certificate Type NIST, Display Type Digital, Compatible Material Steel, Includes Hard Carrying Case, Precision Plastic Shims, Wrist Strap, Manufacturer Warranty Length 2 yr, Batteries Included Yes, Battery Chemistry Alkaline, Battery Size AAA, Battery Voltage 1.5V, Number of Batteries Required 2, Digital Display Screen Type LED