Nuclear Radiation Detector LCD Display Rechargeable Beta Gamma X-ray Portable Handheld Radiation MonitorUnit of measurement: Double-click [Power] key, press [Power] key to enter the options, then display 'Sv/h, Gy/h, mR/h, cpm' five options. Press [] or [] to select the corresponding unit, and then press [Power] to confirm and save. System language: Double-click [Power] key, press [] key to select the second menu item, and then press [Power] key to enter the option. Click [] or [] to select the Chinese/English language. Press [Power] to save the Settings. Alarm setting: Double-click [power] key, press [] key to select the third menu item, then press [Power] key to enter the option, press [] or [] to select switch alarm. After selection, press the [Power] key to save the Settings. Dose threshold: Double-click [Power] key, press [] key to select the fourth menu item, and then press [Power] key to enter the option. This option has a total of 10 dose rate alarm thresholds of '0.05, 0.50, 1.00, 1.50, 2.00, 2.50, 5.00, 10.00, 50.00, 100.0' to choose from. Press [] or [] to select the appropriate threshold and then press [Power] to save the Settings. Cumulative threshold: Double-click [Power] key, press [] key to select the fifth menu item, and then press [Power] key to enter the option. This option has a total of 9 cumulative dose rate alarm thresholds of '0.05, 0.50, 1.00, 2.00, 5.00, 10.00, 20.00, 50.00, 100.0' to choose from. Press [] or [] to select the appropriate threshold and then press [Power] to save the Settings. Screen brightness: Double-click the [Power] key, press the [] key to select the sixth menu item, and then press the [power] key to enter the option. The options are 'Automatic, 25%, 50%, 75%, 100%'. Press [] or [] to select the appropriate brightness and then press [Power] to save the Settings. Time setting: Double-click the [Power] key and press the [] key to select the six options of 'Year, month, day, hour, minute and second' respectively. Then press [Power] button to select the corresponding option, press [] or [] to adjust. Press [Power] to save the SettingsMeasuring Range: 0.01~1000 Sv/h (Max 10m) Measurement Object: Nuclear radiation Measurement Accuracy: 0.01 Sv/h Resolution: Sv/hPackage Contents 1 Nuclear Radiation Detector and 1 BoxNote: 1. Please understand there may be a 1-2cm deviation exist.2. Due to the lighting and monitors, there is a slight difference between the picture and the real one.Promise If the product has any quality problems, please feel free to contact us, and we will help you solve the problem as quickly as possible.