nuclear radiation, radioactive detector 2 kinds of detection methods 3 kinds of alarm mode a of alarm threshold English display interface 24H real-time monitoring Measuring range: A, dose equivalent rate: 0.01 ~ 1000Sv / h (maximum 10mSv / h) B, average value equivalent: 0.01 A, dose equivalent rate: 0.5, 1.0, 1.5, 2.0, 2.5, 5.0, 10.0, 50.0, 100MSV B, cumulative dose equivalent: 0.05, 0.5, 1.0, 2.0, 2.5, 5.0, 10.0, 50.0, 100MSV Measurement object: Unknown area ray patrol - environmental laboratory, environmental pollution investigation - nuclear medicine, meta-biology, radiochemistry - import and export commodity inspection - indoor Model: FS2011 Measurement accuracy: 0.01Sv Resolution: 0.01 Detector: energy compensation FM tube ( leather count tube) Measurements show that the dose rate is displayed per second and alarm is less than 5 seconds Battery Usage: (AA) Colour:black Material:ABS Package Contents: 1 x Radiation Detector 2 x Battery Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.