Radiation Survey Meter, Operating Range mR/hr-.001 (1uR) to 200mR/hr, uSv/hr-0.1 to 2000, CPM-0 to 235, 400, CPS-0 to 3923, Total Counts-1 to 999,000 Counts, Gamma Radiation Range Detects Gamma down to 10-12 KeV, Alpha Energy Sensitivity From 2.0 MeV, Beta Energy Sensitivity From 50 keV, Gamma and X-ray Energy Sensitivity From 10 KeV, Accuracy Typically +/-15 Percent From Factory, +/-10 Percent (NIST), Display LCD, Display Units mR/hr, uSv/hr, CPM, CPS, Powered By AA Alkaline