Radiation Meter, Manufacturer Warranty Length 1 yr, Battery Voltage 9V, Number of Batteries Required 1, Calibration Certificate Type NIST, Battery Chemistry Alkaline, Battery Run Time 1,500 hr, Beta Energy Sensitivity Not Applicable, Maximum Dose Rate 1 uSv/hr, Minimum Dose Rate 0.15 uSv/hr, Digital Display Screen Type LCD, Display Type Digital, Measuring Units R, R/hr, Sv/hr, uSv/hr, Batteries Included Yes, Battery Size 9V, Accuracy +/-15 Percent of Reading (Cs137)