1:Built-in temperature and humidity detection-sensor, the temperature measurement range is -15C to 110C: 2:High detection sensitivity, especially for environmental monitoring to detect traces of electromagnetic radiation. 3:Handheld design, built-in high-performance batteries for easy to carry around with you: 4:Equipped with data record function, and the time interval can be set on the menu manually. 5:The data can be exported to computer, it will generate a file a day, the electromagnetic data and Geiger count data are stored in different folders, and also support check the recorded data.Support alarm value setting, language settings.It can help detect the intensity of ray and detect high energy rays. This is a kind of high quality geiger counter, with high detection sensitivity, especially for environmental monitoring to detect traces of nuclear radiation. It can help detect the intensity of ray and detect high energy rays and also can detect electromagnetic waves which emitted by general electrical appliances, such as computers, TV, mobilephones, microwave ovens and other commonly used electrical appliance. Anti-interference ability, capable of reliable operation in complex electromagnetic environments. It also can detect electromagnetic waves which emitted by general electrical appliances, such as computers, TV, mobilephones, microwave ovens and other commonly used electrical appliance. The shutdown timer can be set, provide no shutdown/5 minutes/10 minutes/30 minutes shutdown settings. Cumulative dose equivalent:H P (10) 0.0usv-99.99msv Dose equivalent rate:H P(10)0.1USV/H-9.99MSV/H Response time:3S Dose response:Less than 20% (1usv/h-99.99msv/h) Energy response:Less than 30% (48KeV-1.3MeV) Relative inherent error:Less than 15% Battery:lithium battery, 3.7V, 1800mAh (included) Colour:As Shown Material:ABS Size:175x70x30mm Package Contents: 1 * Geiger Counter 1 * USB charging cable (the color is random, do not accept specified) 1 * Portable Storage Box 1 * English manual 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.