Features The nuclear radiation detector adopts LCD display, with clear readings and easy operation. Adopt radioactive detector array, high detection efficiency, suitable for beta ray radiation dose rate monitoring. It has 2 kinds of detection modes, 3 alarm modes and multiple alarm thresholds. 24H real-time monitoring, allowing users to view anytime and anywhere. Also has English display interface. Can be used in medical environment, factory environment, home environment, gemstone detection, ore detection, etc. Specification: Condition: Item Type: Radiation Detector Material: ABS Color: As shown in the picture Model: FS2011 Size: Approx.135x70x25mm / 5.3x2.8x1.0in Weight: Approx.200g/7.1oz Detector: Energy compensated FM tube (Geiger counter tube) Energy Range: 50KVE-1.5MEV ≤ ±30 percent Measurement Shows: dose rate is displayed per second, protection alarm is less than 5 seconds A Dose Equivalent Rate: 0.01-1000MSV (maximum 10MSV/H) B Cumulative Dose Equivalent: 0.01MSV-500.0MSV Quite Inherent Error: ≤ ±15 percent (137CS 1msv/h) A Dose Rate: 0.5, 1.0, 1.5, 2.0, 2.5, 5.0, 10.0, 50.0, 100 MSV B Cumulative Dose Rate: 0.05, 0.5.1.0.2.0, 5.0, 10.0, 20.0, 50.0, 100MSV Operating Environment: Temperature -10 ° - and45 ° Relative humidity: ≤ 95 percent (and45 °) Power: 2 x AA battery(Not included) Voltage: 3V Rated Power: 50Hz Package List: 1 x Nuclear Radiation Detector 1 x Instruction Manual 1 x Warranty Card Package List Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.