Specification Name: portable nuclear radiation detector Material: ABS Detectable type: , Y, X-rays Measurement range: 0.05uSv-50mSv Battery: 1 * lithium battery, 300mAh (included) Measurement accuracy: -17% +25% based on 137Csy Operating environment: Temperature - 20 C 50 C, humidity 95% RH, non-condensing Package size: 120 * 50 * 20mm / 4.7 * 2.0 * 0.8in Package weight: 120g / 3.4ounce Description High quality screen display: OLED display shows you the instantaneous dose, average dose and accumulated dose. If the detected data exceeds the preset value, it has two alarm methods, sound and light, to alert you. Portable size: This nuclear radiation detector is designed in a pen style for easy portability and can even be carried around in your pocket. Easy to operate: One touch to turn on the measurement and get the result quickly and easily. Built-in battery: Built-in rechargeable lithium battery, which can test continuously for 50 hours when fully charged. The display automatically sleeps after continuous measurement. Wide application: This nuclear radiation detector can be widely used in nuclear physics, environmental monitoring and industrial fields. Product list. 1* portable nuclear radiation detector 1*USB charging cable