1、Graphic 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. 2、Uses: 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. 3、Real Time Measurement: The real time measurement and display of the dose rate and cumulative dose of the nuclear radiation detector. 4、Preset Alarm Threshold: Alarm thresholds for dose rate and cumulative dose can be preset, Two kinds of selective alarm methods: sound and light. 5、Multifunctional: Power off data is saved permanently, Low power consumption and battery undervoltage indicator function. 1 x Radioactive Detector1 x User Manual1 x Storage Bag Item Type: Radioactive DetectorMaterial: ABSDetection Rays: X, r, hard beta raysDetector: Energy Compensation GM Tube (Geiger Counter Tube)Measuring Range:Dose Rate: 0.08—9999 μSv/h (maximum: 100 mSv/h)Cumulative Dose Equivalent: 0.00μSv—999 mSvEnergy Range: 50 keV— 1.5 MeV ≤ ± 30 % (for 137 Cs I)Relative Inherent Error: ≤±10% (137 CS 1mSv/h)Sensitivity: 80CPM/μSv/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 μSv/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: μSv/h, μGy/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)