Features: Small size and compact, lightweight, portable. High sensitivity, wide measuringrange, long service life. The body is smaller, the screen is larger, the measurement data is clearer, the average value is automatically calculated, the cumulative dose is automaticallysaved. It can be used in electric field detection, magnetic field detection, RF power density detection, material inspection, environmental detection, radiationprotection, radiopharmaceutical screening, etc. Withmute, alarm, particle sound selection button, test, average resetretest selection button, can turn on or off the backlit. Specifications: Material: ABS Size: Approx. 7x3x10.6cm/2.76x1.18x4.17in Screen Size: Approx. 5.7x4.3cm/2.2x1.7in CapacityRange: 20kev to 3mev30%(137Cs-) Sensitivity: 80cpm/sv Accuracy: 0.01Sv/h RealtimeRange: 0-99.99sv/h Accumulate: 0-99.999msv Battery: 3xAA 1.5V/3x1.2V Rechargeable Battery(NOT Included) Power Supply: USB Input 5V1A Color: Black/White Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x GeigerCounter