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. This item has been restricted from sale in the following state (s): []