Feature: 1. High Sensitivity: Geiger Miller technology tube, detecting nuclear radiation, β radial , Y radial and X radial, counting instrument with high sensitivity. 2. Easy to Use: One button startup, startup and measurement. GM counter is used to ensure the accuracy of measurement results. 3. With TFT HD Display: TFT high definition display can display instantaneous dose rate, cumulative dose and average dose rate. It is easy to observe and read in different light environments. 4. Three Kinds Alarm Reminders: The nuclear radiation detector has three kinds of alarm reminders, including sound, flashing light, vibration, and over limit alarm reminders, which can alarm in time to ensure safety. 5. ABS and Battery: The Geiger counter shell is made of premium ABS, durable, with 400mAh built in polymer lithium battery which has long service life. Specification: Item Type: Nuclear Radiation Detector Material: ABS Gross Weight: 120g/4.2oz Detection and Counting: 48mm Geiger counter Detection Range: 00.08 μ Sv/h-9999mSv/h Detection Accuracy: 0.01uSv/h Refresh Rate: 1 second Working Environment: -10-50℃; Humidity ≤ 95 percents, no condensation Battery: Polymer lithium battery 400mAh, included. Package List: 1 x Nuclear Radiation Detector1 x Manual1 x Power Cord