Feature 1ACCURATE DETECTION: With a LND712 Geiger counter tube, this nuclear radiation detector provides precise , , , and X ray radiation measurements with an accuracy level of 20%. 2CUSTOMIZABLE ALARM: You can set and adjust dose rate and dose values to ensure safety with the alarm functions and independent switch, featuring sound, vibration or a combination of both options. 3HD LCD DISPLAY: The radiation dosimeter features a user friendly interface that provides real time readings on a clear LCD display and automatically stores maximum values. 4VERSATILE APPLICATIONS: Ideal for daily use (imported products, jewelry), medical environments (radiology, pharmaceuticals), industrial settings (nuclear power plants, metallurgy), individual protection, and more. 5CONVENIENT AND PORTABLE: With a 2200mAh built in battery, this radiation monitor is easy to carry and store and is designed to withstand harsh environments and heavy use.Item Type: Radiation DetectorMaterial: ABSModel: GM300CPower Supply: 1 x 18650 lithium ion battery 2200mAh (built in)Radiation Types: X rayDetector Type: US LND712 Geiger counter tubeMeasurement Range: 0.01-1000Sv/hEnergy Response: 40KeV-1.5MeVMeasurement Accuracy: Better than 20%Measurement Units: Sv/h, mSv/h, mR/h, CPS, Sv,mSvAlarm Function: Can set an alarm thresholdAlarm Method: Sound, vibration (with independent switch)Accumulated Time: 1-9999 minutes can be setAccumulated Dose: Automatic accumulation, resettable manuallyMaximum Hold: Automatically hold the maximum valueCurve Observing: The latest one hour curve chart, and it automatically calculates the maximum and average valuesMeasurement Modes: Fast and smooth modesLanguages: Chinese and English menuOperating Temperature: -20 to +60Operating Humidity: 5%-95%RH (non condensing)Charging Time: <6H .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Radiation Detector1 x Charging Cable1 x Storage BagNotePlease read the manual carefully before use.