Feature 1Graphic LCD Display: The radiation detector is highly flexible, with a graphic LCD display and a screen resolution of 128X64, which can measure the environmental background. 2Uses: Supports the monitoring of X, r, and hard beta rays, suitable for radioactive substances, ores, marble and other decoration stones, radiology equipment, security inspection and quarantine facilities. 3Real Time Measurement: The real time measurement and display of the dose rate and cumulative dose of the nuclear radiation detector. 4Preset Alarm Threshold: Alarm thresholds for dose rate and cumulative dose can be preset, Two kinds of selective alarm methods: sound and light. 5Multifunctional: Power off data is saved permanently, Low power consumption and battery undervoltage indicator function.Item Type: Radioactive DetectorMaterial: ABSDetection Rays: X, r, hard beta raysDetector: Energy Compensation GM Tube (Geiger Counter Tube)Measuring Range:Dose Rate: 0.089999 Sv/h (maximum: 100 mSv/h)Cumulative Dose Equivalent: 0.00Sv999 mSvEnergy Range: 50 keV1.5 MeV 30 % (for 137 Cs I)Relative Inherent Error: 10% (137 CS 1mSv/h)Sensitivity: 80CPM/Sv/h (for Co60)Alarm Threshold:A. Dose Rate: 0.5, 1.0, 1.5, 2.0, 2.5, 5.0, 10.0, 50.0, 100.0 Sv/h Can Be Selected ArbitrarilyB. Cumulative Dose: 0.05, 0.5, 1.0, 1.5, 2.0, 5.0, 10.0, 20.0, 50.0, 100.0 mSv Can Be Selected ArbitrarilyDose Rate Units: Sv/h, Gy/h, mR/h.Metering Display: Display Dose Rate Per Second; Protection Alarm Response is Less Than 5 SecondsUse Environment:Temperature: - 10 + 45 Relative Humidity: 95% (+ 45 )Power Supply: two AA batteries (not included) . Package List1 x Radioactive Detector1 x User Manual1 x Storage Bag