Feature: 1. Real Time Measurement: Real time measurement of dose rate, and at the same time record the accumulated dose and the average value of the interval. 2. Sound and Light Alarm: Dose rate alarm broad value, measurement alarm reading value can be set by key, with super measurement alarm function, sound and light alarm. 3. Clear Display: White light display design, clear display, night can also be normal reading, convenient for your use. 4. Fault Indication Function: Nuclear radiation detector has sensor fault indication function, the display can be measured continuously after automatic hibernation 5. ABS Material: Geiger counter is made of ABS material, wear resistant and durable, not easy to damage, can be used for a long time. Specification: Item Type: Pen Type Nuclear Radiation Detector Material: ABS Weight: Approx. 94g / 3.3oz Sensor: 48mm Geiger Counter Tube Measurement Range: 0.08uSv to 50mSv Measurement Accuracy: -17%~+25% based on 137Cs γ Operating Environment: Temperature -20°C to 50°C,Humidity <95%RH Without Condensation Endurance: 50Hour (Continuous Measurement, Screen Hibernation) Charging Time: 2 to 3 Hour Alarm Response Time: <10s Battery: Polymer Lithium Battery 1800mAh (Included). Package List: 1 x Pen Type Nuclear Radiation Detector (Ship with Inbuilt Battery)1 x User Manual 1 x Power Cord