1. Scope of application: imported food, marble, cosmetics, radiotherapy radiation, radiology, iodine 131 and drug radiation, industrial radiation, metallurgy, nuclear power plants, personal travel, occupational health, supervisory personnel 2. Measurement type: detection of βγΧ rays 3. Detector type: metal cover counting tube 4. Measuring range: GM100: 0-1000uSv/h, GM100A: 0-36000uSv/h 5. Measurement accuracy: 15%+6/p 6. Alarm value: You can set the alarm value by yourself 7. Alarm mode: vibration alarm, sound alarm 8. Energy response range: γ: 0.1-1.25Mev, β: 0.25-3.5Mev, Χ: 0.03-3.0Mev 9. Language: Chinese and English menu 10. Cumulative time: 1-9999 minutes can be set 11. Cumulative metering: automatic accumulation, manual clearing 12.Max measured value hold: automatically hold the maximum value in the current cumulative dose 13. Curve observation: the last hour curve map 14. Measurement mode: fast mode, smooth mode 15. Measurement unit: uSv/h, mR/h, uSv 16. Battery life: about 48 hours 17. Power supply: AAA battery x 1 (not included in delivery) 18. Product size: 7.4 x 5.8 x 2.9 cm 19. Weight: 90 grams 20. Multi-function page, view measurement data in real time 21. It can be connected to the USB power supply for long-term measurement 22. Back clip design, easy to carry 23. Long battery life, meeting the needs of various scenarios