-friendly:Handheld instrument with LCD Display ,covering two measurement alert methods and recording modes.Accessible for the Technical Data:Use counter tube as nuclear radiation, measurement range 0.08uSv-50mSv, measurement accuracy -17%... +25% based on 137Csy, standby for 14 note: The sensor of this nuclear radiation detector is on right sides, the value will be more accurate when monitoring to right sides of the instrument Application occasions:Widely used radiation, irradiation processing enterprises, health epidemic prevention and other existence of ionizing radiation environment, personal received radiation dose and protection occasions Material: ABS Color: as shown Package Contents: 1 x Detector 1 x USB Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.