Feature 1LIVING ENVIRONMENT: Radiation from daily life, imported products, marble, ceramic tiles, minerals, negative ion products, and other scenes. 2MEDICAL ENVIRONMENT: Radiology, CT, CR, DR, blood irradiation equipment, radioactive nuclides, drug iodine 131, and other scenes. 3INDUSTRIAL ENVIRONMENTS: Nuclear power plants, laboratory environmental assessments, waste metals, and nuclear radiation in industrial environments. 4INDIVIDUAL PROTECTION: Occupational health. Health of regulatory, customs, pregnant women, and other personnel (travel, occupational health, regulatory personnel) 5SENSITIVE COUNTER TUBE SENSOR: Adopting premium counter tube sensors, the effective detection area is larger and wider than similar instruments in the market. 6MULTIPLE ALARM METHODS: Flashing light alarm and audible alarm, with the user setting the alarm value (factory set to 4 Sv. 7LCD DISPLAY: Equipped with a HD 4 digit LCD large screen display, switching between 5 international measurement units.Item Type: Geiger CounterMaterial: ABSPower Supply Method: 1 x 6F22 9V dry battery 680mAh (built in carrying)Ray Type: , , And X raysDetector Type: Geiger counter tube (diameter 1.75 inches 45mm)Measurement Range: 0.001 to 100mR/h, 0.01 to 1000 Sv/h, 0 to 300000CPM, 0 to 5000CPS, 0 to 9999X TotalEnergy Range: 00KeV to 3MeVMeasurement Accuracy: 15%Measurement Unit: Sv/h, mR/h, CPS, CPM, Total, HDLD, alarm value, battery levelAlarm Value Function: Alarm threshold can be setAlarm Method: Sound and light alarm, self setting alarm value (factory set to 4 SvDisplay: Approx. 60 x 42mm / 2.36 x 1.65in large screen, HD LCD display, six digit digital LCD display (including display of various methods and labels)CAL Coefficient: 0.01 to 9999 rangeWorking Temperature: -50 to +80 For Sievert, for Rem Display Conversion: YesBar Chart Display: YesSave Maximum Value Display: YesResponse Time: Less than or equal to 3 secondsSensitivity: CO (60): 3480CPM/mR/h . Package List1 x Geiger Counter1 x Storage BoxNotePlease read the manual carefully before use (the manual has been uploaded)