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 meter, GM meter sensor, which ensures superior detection sensitivity. Large Battery Capacity: Equipped with 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 β X radial γ X-rays, CND, radiation from nuclear industry site and nuclear power plant, hospital CT radiation, iodine 131, etc. EASY CARRYING - Comes with compact size and light weight, you can easily take this detector with you to help you in your work. Specification: Item type: radiation detector. Material: ABS Battery: 1 x 2000mAh 18650 lithium-ion battery (comes with a built-in battery) Detection radius type:γ, X and β radial Detector: GM energy compensation tube (Geiger tube meter) Dose rate range: 0.01 to 1,000 μ Sv/h (maximum 10 mSv/h) Cumulative dose: 0.01 μ Sv/h at 500.0 mSv Energy response: 50keV at 1.5MeV less than or equal to ±30% (for CS 137) Sensitivity:80CPM/μ Sv/h (for Co 60) Alarm threshold: One 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 rate is updated once per second and the response of the protection alarm is less than 5 seconds Display screen: LCD color screen Alarm mode: visual, sound Package List: 1 x Radiation Detector 1 x Manual 1 x Charging Cable 1 x Storage Box Package List 1 x Radiation Detector 1 x Manual 1 x Charging Cable 1 x Storage Box