Instructions: 1. Power button ON to , automatically display real-time monitoring interface; After the shutdown, press and hold off zero current consumption; Triangular button is used to measure the mean, Natural environment there is background radiation (background radiation) It will fluctuate within a certain range.2. The top of the screen displays a blue font for the "second" real-time update of the dose rate, which is characterized by fluctuations, update speed, real-time, is the mean of the middle of the red font display, is a mean dose rate period, when detecting an item or the environment when press the button (this time can no move the tester);3. Enter the state average measurement will display the measurement results after of the trend presents the average real measurement value of each moment, mean measurement is characterized by high precision, the effective dose equivalent response rate real environment, the elapsed time is .4. Horn button is used to select the device, each time you press the switch source. When the small speaker is displayed when the artificial alarm sound (only achieve this status only sound the alarm ), When the mute is displayed when that turn off all sources. 7. The scale key (right key) is used to switch the alarm , Four optional 0.5 / 1.0 /2.0 /5.0High sensitivity. Wide measuring range. Advantages of . Using of sophisticated tube as the core sensor. Brand new and high quality. Detachable objects: (), (), x-ray. Can detect any item or environment of (ie, nuclear radiation).Use: 1. Material inspection.2. Environmental test. 3. Radiology Protection. 4. Radiopharmaceuticals screening. 5. Sensor Type: tubeParameter: 1. Energy Range: 50kev-1.5m less than 30%; 2. Relative intrinsic error: less than plus or 10%; 3. Sensitivity: 80cpm / USV / co-60; 4. The maximum dose equivalent rate: 99.99usv / h; 5. Voice Source: Real particle sound / Alarm sound / Mute; 6. The use of temperature: -25 ~+45; 7. Relative humidity: less than 95%; 8. Power supply: 2 x AA batteries(NOT included)colour: blackMaterial: ABSPackage Contents:1 x Geiger Counter Nuclear Radiation Detector1 x English instructionsOnly the above package content, other products are not included.Note: Light 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.