Radiation Detector, Manufacturer Warranty Length 2 yr, Battery Voltage Not Applicable, Number of Batteries Required 2, Calibration Certificate Type NIST, Battery Chemistry Alkaline, Battery Run Time 800 hr, Beta Energy Sensitivity Not Applicable, Maximum Dose Rate 200 mR/hr, Minimum Dose Rate 1 mR/hr, Measuring Units mR, Batteries Included Yes, Accuracy +/-10 Percent of True Close for Cs-137 or Co-60 Gamma, Gamma Energy Sensitivity 6 MeV