Nuclear radiation, can detect X, β, γ Ray . Trend graph, Particles sound, Alarm sound, Display sound. Built-in Geiger counter, which is characterized by accurate measurement and high range. Measure the dose rate real-time, and record the cumulative dose at the same time. The dose rate alarm threshold and dose alarm threshold can be continuously adjustable and arbitrarily set. Can view the start date of the current cumulative dose. Have dual alarm functions of dose rate and dose value. With buzzer sound alarm function. When the radiation dose rate exceeds 10mSv/h, it has a blocking warning prompt function (display 999MAX). Different batches may have different printed characters, but it not affect the use Color: Black Material: plastic Package Contents: 1 x Detector 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.