Feature 13 Alarm Signs: The nuclear dosimeter display has 3 alarm cues: sound, vibration and light. When the radiation is too strong, it will timely alarm to prevent harm to the human body. 2Function Description: With dual metering function, current content and cumulative content, so that you can view the current content, also can view the radiation received for a long period. 3Well Designed: 8 alarm thresholds, available at 0.5, 1.0, 1.5, 2.0, 2.5, 5.0, 10.0, 50.0, 100.0uSVh, making you feel convenient during your operation. 4Long Endurance: With power off memory function, high sensitivity of the instrument, data will not lost, durable battery life for about 120h. 5Multi Functional: Our detector has 3 detection units, usv/h, uGy/h, mR/h, you can change them at your will, able to meet most of your needs for using.Item Type: Radiation DetectorMaterial: ABSColor: As Picture ShownApplication: for Factory, Environment, Hospital, Home Decoration, Stone, EtcGross Weight: Approx.190g/6.7ozDetection Rays: , X and Hard RaysDose Rate Unit: uSv/h, uGy/h, mR/hDose Equivalent Rate: 0.08~9999uSv/HAccumulated Dose Equivalent: 0.00uSv ~ 999.0msVEnergy Range: 50keV-1.5MeV<30% (for 137CS I)Relative Inherent Error: 10% (137CS 1mSv/H)Detector: Energy Compensated GM Tube (Geiger Counter Tube)Sensitivity: 80CPM/USv/H (for Co60)Alarm Threshold Setting Parameters:Dose Rate: Optional At 0.5, 1.0, 1.5, 2.0., 2.5, 5.0, 10.0, 50.0, 100.0uSv/HAccumulated Dose: 0.05, 0.5, 1.0, 1.5, 2.0, 5.0, 10.0, 20.0, 50.0, 100.0mSv OptionalPower Supply: 2 AAA Batteries (Not Included)Operating Temperature: -10~+45Relative Humidity: 95% (+45) . Package List1 x RadiationDetector1 x Lanyard1 x Manual