Fangrui Product Details 1. Bside L1 High Precision Digital Illuminance Meter Light Meter2. Data Hold Function, Photometric Unit Conversion, High-precision Measurement3. Large-screen Lcd Display Visible Light Intensity4. No Operation For 15 Minutes, Automatic Shutdown Function5. The Meter Will Automatically Detect The Battery Current, When The Low Battery Symbol Is Displayed, Please The Battery In Time6. Suitable For Hospitals, Shopping Malls, Gyms, Offices, Gymnasiums, Hotels, Etc.7. Can Be Used To Measure The Brightness Of Visible Light In The Environment To Be Tested8. Power Supply Mode: 1 X 9v Battery (not Included In The Product)9. Measuring Range: 0.1-200000 Lux, 0.01-20000fc10. Sampling Rate: 2 Timessecond11. Resolution: 0.1lux 0.01fc12. Dimensions: 145x67x32mm