Fangrui Product Details 1. Digital Light Meter Illuminance Lux Meter Backlight Lcd Display 0.1-200000lux0.01-20000fc Light Sensor Tester 2. Measuring Range: 0.1-200000lux0.01-20000fc 3. Measuring Steps: 20020002000020000olux, 20200200020000fc 4. Illumination Display: 4-digit Display, Up To 1999 5. Sensor: Silicon Photodiode With A Light Filter 6. Angle Of Incidence: 120 Degrees 7. Spectral Range: 400-700nm 8. Sampling Rate: 2 Timessecond 9. Automatic Shutdown: 15 Minutes (can Be Turned Off Manually) 10. Operating Environment: -10 - 50 Degrees Celsius, Relative Humidity Within , Indoor Altitude Less Than 2000m 11. Storage Environment: -10 - 50 Degrees Celsius, Within Relative Humidity (remove The Battery) 12. Power Supply: 2 X 1.5v Aaa (r03lr03) Batteries (not Included) 13. Display Size: About 3.4 X 3.1cm 14. Dimensions: About 16.8 X 5.9 X 3.4cm 15. Weight: About 150g 16. Features: 17. High-precision Probe With Digital Photodiode, Filter Lens, 120-degree Angle Of Incidence 18. Lux Fc Two Units Switching 19. Large Hd Display With White Background Lighting 20. 15 Minutes Without Operation After The Automatic Shutdown (can Be Canceled Manually) 21. Maximum Minimum Value Can Be Viewed 22. Packing List: 23. - Main Unit X 1 24. - Cloth Bag X 1 25. - Instruction Manual X 1 26. - Protective Cover X 1