Features 1、MAIN FUNCTIONS: Nuclear radiation detector with built in geiger muller sensor, with quick response time, high accuracy, and can detect γ, X and β radiation, energy range is 48KeV‑3.0MeV ≤±15% (for 137Cs‑γ). 2、SOUND ALARM: The detected radiation exposure exceeds the alarm threshold (TREND: 0.5μSv/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 β、γ non destructive testing and other fields. Specification Item Type: Radiation Detector Product Model: AIR-02 Battery: 1 x 2500mAh Lithium Ion Battery (built in battery) Sensor Type: Energy Compensation Type Geiger Muller Tube (Geiger Counter Tube) Detection Ray Type: γ, X and β Rays Energy Range: 48keV-3.0MeV (137Cs-γ) Relative Inherent Error: < ±15% (at 1mSv/h) Measurement Range: Dose Rate: 0.00μSv/h-1mSv/h Measurement Range: Dose: 0.00μSv-99.99μSv Sensitivity: >1.5cps/μSv/h (vs.137Cs) Working Temperature: -10℃-50℃, ≤+10% Power Consumption: 0.25W Charging Time: 4-5 Hours Screen Size: Approx. 57 x 43mm / 2.2 x 1.7in Package List 1 x Detector 1 x USB Cable 1 x User Manual