Features Sensitive Operation: This detector adopts GM counter, GM counter sensor, which ensures a premium detection sensitivity. Visual, Audible Alarm: The detector can provide audible and visual alarms if radiation is detected. And the alarm value can be set. Large Battery Capacity: Equipped with a 2000mAh large capacity rechargeable battery, this detector will no longer need to replace the battery frequently, which is more convenient and green. Easy Carrying: Comes with a compact size and a light weight as well, you can easily take this detector with you to help with your work. Wide Application: This detector can detect nuclear radiation radioactivity and X ray γ radial β X ray, NDT, radiation of nuclear industry site and nuclear power plant, CT radiation of hospital, iodine 131, etc. Specification: Item Type: Radiation Detector Material: ABS Battery: 1 x 2000mAh 18650 lithium ion battery (shipped with built in battery) Detection Ray Type: γ, X and β radial Detector: Energy compensation GM tube (Geiger counter tube) Dose Rate Range: 0.01 to 1000 μ Sv/h (Maximum 10mSv/h) Cumulative Dose: 0.01 μ Sv/h to 500.0mSv Energy Response: 50keV to 1.5MeV less than or equal to ± 30% (for CS 137) Sensitivity: 80CPM/ μ Sv/h (for Co 60) Alarm Threshold: a. Dose Rate: Can be set as 0.5, 1.0, 1.5, 2.0, 2.5, 5.0, 10.0, 50.0, 100.0 μ Sv/h b. Cumulative Dose: Can be set as 0.05, 0.5, 1.0, 2.0, 5.0, 10.0, 20.0, 50.0, 10.0 μ Sv Measurement Display: The dose rate is updated once a second, and the protection alarm response is less than 5 seconds Display Screen: LCD color screen display Alarm Mode: Visual, audible  Package List:1 x Radiation Detector1 x Manual 1 x Charging Cable1 x Storage Box Package List 1 x Radiation Detector 1 x Manual 1 x Charging Cable 1 x Storage Box