Feature 1Sensitive Induction: Using glass geiger counter you will get sensitive induction, to ensure the accuracy of measurement results. 2Accumulation and Maximum Hold: The accumulation time of the nuclear radiation detector is 1-9999 minutes can be set, and the accumulated dose is automatically accumulated and can be manually reset. The maximum value hold is automatically hold the maximum value. 33 Alarm Modes: Our geiger counter alarm tester has 3 alarm modes. Sound, vibration, sound plus vibration. You can operate with the mode that suits you. 4High Decibel Sound Alarm: High accuracy components for radiation detection results fast and accurate, this geiger tester also adopst manual threshold automatic alarm. 5Widely Applied: Nuclear radiation tester can be used in the living environment, such as jewelry, food. Can be used in the medical environment, such as radiology, medicine, CT. Can be used in the industrial environment, such as mines, metal processing. Can be used for individual protection, such as occupational health, medical care, etc.Item Type: Nuclear Radiation DetectorMaterial: ABSPower Supply: 1 18650 Lithium Ion Battery 2200mAh (Built-In Carry)Type Of Rays: X And RaysDetector Type: Glass Geiger Counting TubeMeasurement Range: 0.01-9999Sv/HEnergy Response: 40KeV-1.5MeVMeasurement Accuracy: Better Than 20%Measurement Units: Sv/H, MSv/H, MR/H, CPS, Sv,MSvAlarm Value Function: Alarm Threshold Can Be SetAlarm Mode: Sound, Vibration (With Independent Switch)Accumulation Time: 1-9999 Minutes Can Be SetAccumulated Dose: Automatic Accumulation, Can Be Manually ResetMaximum Value Keep: Automatically Keep The Maximum ValueCurve Observation: The Last Hour Curve Mapping, And Automatically Calculate The Maximum Value And Average ValueMeasurement Mode: Fast or Smooth 2 ModeVoice: Chinese And English MenuWorking Temperature: -20-+60Working Humidity: 5%-95%RH (No Condensation)Charging Time: <6H . Package List1 x Nuclear Radiation Detector1 x Charging Cable1 x Storage BagNotePlease read the instructions carefully before use.