Feature 1Real Time Measurement: Real time measurement of dose rate, and at the same time record the accumulated dose and the average value of the interval. 2Sound 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. 3Clear Display: White light display design, clear display, night can also be normal reading, convenient for your use. 4Fault Indication Function: Nuclear radiation detector has sensor fault indication function, the display can be measured continuously after automatic hibernation 5ABS Material: Geiger counter is made of ABS material, wear resistant and durable, not easy to damage, can be used for a long time.Item Type:PenTypeNuclearRadiationDetectorMaterial: ABSWeight: Approx. 94g / 3.3ozSensor: 48mm Geiger Counter TubeMeasurement Range: 0.08uSv to 50mSvMeasurement Accuracy: -17%~+25% based on 137Cs Operating Environment: Temperature -20C to 50C,Humidity <95%RH Without CondensationEndurance: 50Hour (Continuous Measurement, Screen Hibernation)Charging Time: 2 to 3 HourAlarm Response Time: <10sBattery: Polymer Lithium Battery 1800mAh (Included) .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x PenTypeNuclearRadiationDetector(Ship with Inbuilt Battery)1 x User Manual1 x Power Cord