Radiation Survey Meter, Manufacturer Warranty Length 6 mo, Battery Voltage 9V, Number of Batteries Required 1, Calibration Certificate Type NIST, Battery Chemistry Alkaline, Battery Run Time 2,000 hr, Beta Energy Sensitivity 150 keV, Maximum Dose Rate 500 uSv/hr, Minimum Dose Rate 0 uSv/hr, Digital Display Screen Type Analog, Display Type Analog, Measuring Units CPM, mR/hr, uSv/hr, Battery Size 9V, Accuracy +/-15 Percent of Reading (Referenced to Cs-137), Alpha Energy Sensitivity 2.5 MeV