Features: Using Imported Geiger Counter Sensor: for accurately and comprehensively detecting , , , and X-ray, accumulating the radiation detection value and converting units of measurement, with select button for different ray measurement. Professional Radiation Detector: with alarm, time display, BT data transmission, and pulse counting functions, automatic selection of measurement range. Large Internal Memory Capacity: with BT communication data transmission function and powerful software for data evaluation, it can directly store 4000 groups of data inside, transfer to PC, and no need manual record. Mini Impact-resistant Design: meet ergonomic principle, comfortable hand-feel, easy to operate, and comes with a sturdy case for storage and carrying. LCD Display with Back-light: clearly display the measuring dynamic, ray category, reading, real-time time, battery indication, measurement symbols and simulating diagram indication. Wide Applications: it can be used to detect the groundwater, radium pollution, radioactivity of underground drill pipe and equipment, radioactive material detection of decoration material for houses and office buildings, X-ray intensity in medical and industrial usage, etc. Specifications: Material: ABS Display: 4 digits large LCD Ray Type: , , , and X-ray Data Storage: 4000 groups Sensor: Halogen compensating detector (G.M Geiger counter tube) Output Port: Wireless BT transmission (space transmission distance is 10m) Alarm Function: Adjustable alarm value(default setup is 5Sv/hr) Normal Radiation Value of Natural Environment: <0~0.2uSv/h BT Transmission: 1 group/second (include date, time, value, unit) Software: Real time data transmission, analysis, and recording Operating Temperature: 0~50 Power Supply: 4 * 1.5V AA battery (NOT included) Item Size: 205 * 70 * 45mm / 8.07 * 2.76 * 1.77in Item Weight: 228g / 8.04oz Package Weight: 897g / 31.64oz Package Size: 27 * 19 * 7.5cm / 10.63 * 7.48 * 2.95in Packing List: 1 * Radiation Detector 1 * Carrying Case