Fangrui Product Details Wide Range Of Measurement: Measures Light From 0 To 200,000 Lux, Making It Suitable For A Wide Range Of Applications. Accurate Readings: The Lux Meter Provides Accurate Readings Of Light Levels, Ensuring That You Get The Most Precise Measurements Every Time. Easy To Use: With Its Simple Design And Easy-to-read Lcd Display, This Lux Meter Is Incredibly User-friendly. The Digital Light Meter Will Allow You To Measure The Lighting In An Area. The Digital Light Meter Uses A 9v Battery(not Included); Accurate Up To 200,000lux +/- Hold Function, Autorange Manual Range,auto Power Off: Afterapprox.15 Minutes. Specifications: 1. Display:large Lcd Characters Display 2. Range:0.1-200,000lux, 0.01-20,000fc 3. Resolution:0.1lux/0.01fc 4. Accuracy: 5. Measurement Speed:2 Times/second 6. Units:lux Fc 7. Hold Function, Auto Range Manual Range 8. Auto Power Off:after Approx.15 Minutes 9. Power Supply:one 9v Battery.(not Included) 10. Low Power Of Battery Detecting 11. Operating Environment:14 To 122-10 To 50