Features MAIN PURPOSE: Handheld nuclear radiation detector with high accuracy and sensitivity, measuring range is 0.05uSv‑50mSv, can be used to monitor X, β and y rays. GOOD PERFORMANCE: The microprocessor with powerful performance is selected and equipped with a TFT2.0 color screen, which is easy to operate and has less interference. ALARM METHOD: Arbitrary combination of sound and flash alarm methods, and the alarm threshold can be set arbitrarily, when the threshold is reached, an alarm will be issued in time. MULTIPLE FUNCTIONS: With real time monitoring, automatic over standard alarm and fault self checking function, support timing measurement, can be set arbitrarily between 00‑999 hours. APPLICABLE SCENES: Widely used in home improvement radiation, nuclear laboratory, petrochemical, geological census, radiation dose supervision and protection for individuals. Specification Battery: Rechargeable lithium battery 3.7V 1500mAh (built in battery) Application: Nuclear radiation detection alarm Sensor: GM counter tube Measuring Range: 0.05uSv-50mSv Measurement Accuracy: -17%-+25% based on 137CsY Battery Life: 20 days (continuous measurement, no particle sound) Charging Interface: TYPE-C Interface (green light is always on when charging, full off) Alarm Response Time Td: <10s Alarm Threshold Deviation: -17%-+25% Instantaneous Value Measurement Range: 0.05uSv-50mSv Average Measurement Range: 0.05uSv-50mSv Cumulative Dose Value Range: 0.1uSv-9999mSv 1. Start: When the instrument is turned off, press and hold the II button for 3 seconds to complete the startup, and the main interface will be displayed after startup. 2. Shut Down: Press and hold the II button for 3 seconds to complete the shutdown. Note: If the lock head appears on the top of the screen, it cannot be turned off. If it is turned off, please enter the Timer Measurement page and click to stop the timer, it will stop the timer and turn it off. Package List: 1 x Detector 1 x Data Cable 1 x Tool Kit 1 x Lanyard 1 x User Manual Package List 1 x Detector 1 x Data Cable 1 x Tool Kit 1 x Lanyard 1 x User Manual