Feature:1. MAIN FUNCTIONS: Nuclear radiation detector with built in geiger muller sensor, with quick response time, high accuracy, and can detect , X and radiation, energy range is 48KeV3.0MeV 15% (for 137Cs).2. SOUND ALARM: The detected radiation exposure exceeds the alarm threshold (TREND: 0.5Sv/h), the radiation monitor will automatically sound an alarm, can be turned off by pressing the sound button on the screen.3. LCD DATA DISPLAY: The detector has a white backlight large LCD screen, which displays real time dose (REAL), average radiation dose (AVG), radiation un chart, and the pause key for locking the test value.4. BUILT IN BATTERY: Equipped with 2500mAh high capacity battery, the detector can enter a power saving mode after turning off the backlight, can work continuously for 1 week without the need for frequent charging.5. EASY OPERATION: The Geiger counter has simple buttons and a clear screen, which is suitable for beginners, the elderly and advanced users, with convenient operation, stable performance and strong practicability.6. WIDE APPLICATION: Widely used in automobiles, household use, nuclear power plants, accelerators, steel industry, healthcare, environmental testing, X non destructive testing and other fields.Specification:Item Type: Radiation DetectorProduct Model: AIR-02Battery: 1 x 2500mAh Lithium Ion Battery (built in battery)Sensor Type: Energy Compensation Type Geiger Muller Tube (Geiger Counter Tube)Detection Ray Type: , X and RaysEnergy Range: 48keV-3.0MeV (137Cs-)Relative Inherent Error: < 15% (at 1mSv/h)Measurement Range: Dose Rate: 0.00Sv/h-1mSv/hMeasurement Range: Dose: 0.00Sv-99.99SvSensitivity: >1.5cps/Sv/h (vs.137Cs)Working Temperature: -10-50, +10%Power Consumption: 0.25WCharging Time: 4-5 HoursScreen Size: Approx. 57 x 43mm / 2.2 x 1.7in.Package List:1 x Detector1 x USB Cable1 x User Manual