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 hibernation5. 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 DetectorMaterial: 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).Package List:1 x Pen Type Nuclear Radiation Detector (Ship with Inbuilt Battery)1 x User Manual 1 x Power Cord