1. Note: NO battery included. The nuclear radiation detector can use either rechargeable batteries or dry batteries. One machine requires two batteries. 2. Fast Response Wide Measuring Range: The nuclear radiation monitor responds quickly to radiation, and will alarm in time in highrisk environments. The instrument enjoys a high flexibility and can measure the environmental background. The detection value is updated in real time. 3. Smart Protection Alarm: Enter the option of alarm setting to set the cumulative alarm value and the alarm value of dosage rate. When the radiation value exceeds the set value, the nuclear radiation dosimeter will alarm automatically. The daily use of nuclear radiation detector helps to avoid radiation hazards in daily life. 4. Small Easy to Operate: The nuclear radiation detector is compact and portable with three measurement units. Permanent data storage upon power cut off. It is easy to operate by both beginner, senior or elderly people and advanced users