Features MAIN PURPOSE: Portable nuclear radiation detector, can be used to test beta, gamma, x ray, compact and easy to carry, the alarm threshold can be set arbitrarily. CLEAR DISPLAY: This radiation tester adopts 1.8 inch color TFT screen, with waveform display trend, easy to read data clearly at any time. HIGH PERFORMANCE: With high sensitivity and good stability, with instantaneous response (3‑5S), small operation error, efficient and durable. MULTIPLE ALARMS: When the radiation exceeds the standard, it has triple alarm sound, light, color display and has 4 levels of brightness adjustment. POWER SUPPLY: Equipped with USB cable, can be charged by USB and built-in lithium battery, the detector can be used for a long time. Specification: Item Type: Radiation Detector Power: 3.7V 1000mAh lithium polymer battery (built-in battery) Charging voltage: 5V Charging current: ≥1A Indicator light: green light on, charging; green light off, fully charged. Display: 1.8 inch color TFT display, 4-level brightness adjustment Shell material: ABS Technical Parameter: Detectable species: β, γ, x rays Tube model: J302 tube Real-time dose range: 0.00-9.99 mSv/h Cumulative dose range: 0.00-500 mSv Sensitivity: 0.25 cps/uSv/h Energy response: 48keV-1.5MeV Resolution: 0.01uSv/h Error: ≤10% Package List: 1 x Radiation Detector 1 USB cable 1 user manual Note: Do not bump it at will to avoid irreversible damage. Package List 1 x Radiation Detector 1 x USB Cable 1 x User Manual