1、1. Easy to use: Geiger counter, smaller body, bigger screen, clearer measurement data and easier operation. 2、2. Wide measurement range: high-sensitivity nuclear radiation detector, large measurement range and long service life. 3、3. Function: The GM tube sensor has a built-in digital nuclear radiation detector, which can test β, gamma and X-rays. 4、4. Operation: Portable Geiger counter with mute, alarm, particle audio select buttons, test, average reset repeater select buttons, backlight can be turned on or off. 5、5. Application: The nuclear radiation detector can be used in material inspection, environmental inspection, radiation protection, radiopharmaceutical screening, etc. Material: Plastic Colour: Black Dimensions: 10.5x7x3cm / 4.13x2.76x1.18 inches Detectable Species: β Gamma X-ray Sensor Type: GM Tube Energy range: 50kev-1.5mev less than 30% Relative inherent error: less than plus or minus 10% Sensitivity: 80CPM/USV/CO-60 Maximum dose power: 99.99USV/H Sound source: Paint sound/alarm sound/silent Operating room temperature: -25~+45 degrees Relative Humidity: Below 95% Power supply: 3 AA (not included) 1* Special detector for nuclear radiation 1* Instruction Manual