Features Visual and Audible Alarm: The detector can provide audible and visual alarms if radiation is detected. And the alarm value can be set. Sensitive Operation: This detector adopts GM counter, GM counter sensor, which ensures exceptional detection sensitivity. 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 environmentally friendly. Wide Application: This detector can detect nuclear radiation radioactivity and γ radial β X-rays, NDT, nuclear industry and nuclear power plant site radiation, hospital CT radiation, iodine 131, etc. Easy to Carry: Comes with compact size and light weight, you can easily carry this detector with you to help you in your work. Specification: Item Type: Radiation Detector Material: ABS Battery: 1 x 2000mAh 18650 Li-ion battery (comes with built-in battery) Type of detection beam: radial γ, X and β Detector: Energy compensated GM tube (Geiger counter) Dose rate range: 0.01 to 1000 μ Sv/h (maximum 10 mSv/h) Cumulative dose: 0.01 μ Sv/h to 500.0 mSv Energy response: 50 keV to 1.5 MeV less than or equal to ± 30% (for CS 137) Sensitivity: 80 CPM/μ Sv/h (for Co 60) Alarm threshold: A. Dose rate: can be set to 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 to 0.05, 0.5, 1.0, 2.0, 5.0, 10.0, 20.0, 50.0, 10.0 μ Sv Measurement display: the dose is updated once per second, and the protection alarm response is less than 5 seconds Screen: color LCD display Alarm modes: visual, acoustic Package List: 1 radiation detector 1 manual 1 charging cable 1 storage box Package List 1 x Radiation Detector 1 x Manual 1 x Charging Cable 1 x Storage Box