Radiation Detector, Manufacturer Warranty Length 1 yr, Battery Voltage 9V, Number of Batteries Required 1, Calibration Certificate Type NIST, Battery Chemistry Alkaline, Battery Run Time 2,000 hr, Beta Energy Sensitivity 300 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, Batteries Included Yes, Battery Size 9V