UT381A Digital Illuminance Meter, Integrated/Separate Measurement 400000ix Range, Wide Measurement Range, From 0 To Maximum 400000ix To Meet Users' -Range Testing Needs Detachable Probe Design, Integrated Rotatable And Detachable Probe Design To Cope With Testing Environments App Bluetooth Communication Measurement Data Recording Function, The Instrument Can Record 99 Sets Of Data, And The Mobile App Has No Upper Limit On The Number Of Recording Sets To Meet -Capacity Recording Needs. 1. Measuring Range: 0-400,000 X 2. Accuracy: 3% Calibrated According To Standard At 2856k; 6% For Other Visible Light Sources 3. Unit Switching: BX,FC 4. Function: Automatic Range Switching; Maximum Value/Minimum Value/Average Value; Value Hold; Color Correction Coefficient 5. Mobile App: IENV 6. Data Recording: 99 Groups 7. Recording Interval: 1 To 8. Probe Measurement : Integrated (Rotatable), Split Type 9. Real-Time Time: Manually Set Or Automatically Synchronize Time After Connecting To Mobile App 10. Automatic Shutdown: Automatically Shut Down After 10 Minutes Of No Operation, Can Be Canceled 11. Battery Life: 100 Hours (Alkaline Battery, Without Bluetooth And Backlight) 12. Working Temperature And Humidity: -10C To 50C, 90%Rh (Non-Condensing) 13. Storage Temperature And Humidity: -20C To 70C, 80%Rh (Non-Condensing) 14. Power Supply: AAA*3 15.Colour:As Shown 16.Material:ABS Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Package Contents: 1 x UT381A Digital Light Meter 1 x Cloth Bag 1 x Protective Cap (Installed On The Probe Sensor) 1 x Lanyard Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.