Features 3 in 1 Testing: Comes with 0.01-1000μSv/h wide measuring range of radioactive substances, the Geiger counter can detect hard β, γ and X rays. Alarm Function: Supports easy manual setting on the threshold valve, this nuclear radiation detector is equipped with automatic alarm function. Better Display: Large HD digital display has low power consumption, together with the accurate counting tube, the testing and reading are easy. With ABS Shell: The casing is mainly made of premium ABS material, which is durable with pressure, falling and wearing, offering good protection. Flexible Using: Can be widely used in detecting domestic nuclear radiation, industrial nuclear radiation, treatment nuclear radiation and more. Specification: Item Type: Nuclear Radiation Detector Material: ABS Power Supply: 1 x built in 18650 lithium ion battery with 2200mAh capacity.  Ray Type: For hard β, γ and X rays.  Detector Type: Metal Cover Counter Tube Measurement Range: 0.01-1000μSv/h Energy Response: 40KeV-1.5MeV Measurement Accuracy: Better Than ± 20% Measurement Unit: μSv/h, mSv/h, mR/h, CPS, μSv, mSv.  Alarm Value Function: Alarm threshold can be set.  Alarm: Sound, vibration, with independent switch.  Accumulated Time: 1-9999 minutes adjustable.  Accumulated Dose: Automatic accumulation, can be manually reset.  Maximum Hold: Automatically hold the maximum value.  Curve Observation: Curve graph of the last hour, and automatic calculation of maximum and average values.  Measurement Mode: Fast and smooth modes.  Voice: Chinese and English menus.  Working Temperature: -20℃ ~ +60℃ Working Humidity: 5% - 95%RH, non condensing.  Charging Time: <6H Package List: 1 x Nuclear Radiation Detector 1 x Charging Cable 1 x Storage Bag Note: Read the user manual carefully before use. Package List 1 x Nuclear Radiation Detector 1 x Charging Cable 1 x Storage Bag