Fangrui Product Details 1. Uni-t Ut383bt 200,000 Lux Digital Luxmeter Luminance Light Meter With Lcd Backlit Display 2. Ut383bt Is Equipped With Photoelectric Sensor Technology, Which Can Effectively Represent The Light Intensity And Electrical Signal, And Then Process The Data And Display The Result On The Lcd. 3. The New Bluetooth Communication Function Is Added, Which Is More Convenient To Use; Ienv App Supports Data Recording, Data Export (pdfexceltrend Graph), Maxmin Measurement Indication. 4. Small And Beautiful, Easy To Carry, Silicone Operation Button, After Friction Test, Not Easy To Fade, Feel Better. 5. Flip-top Battery Compartment Design, Easy To The Battery, Copper Tripod Fixed, Durable 6. Lcd Large-screen Backlight Display, Measurement Data Function Symbol Display, Readings Are Clear At A Glance, High-definition 7. Parameter: 8. Illuminance Measurement Range: 0-199900lux 9. Range: 0-9999lux, Resolution 1lux, Accuracy +-(rdg+8 Dgts) 10. Range: Greater Than Or Equal To 10000lux, Resolution 10lux, Accuracy +-(rdg+10 Dgts) 11. Range: Greater Than Or Equal To 100000lux, Resolution 100lux, Accuracy +-(rdg+10 Dgts) 12. Ambient Temperature: 0-40 Degrees Celsius 13. Power Supply Mode: 3 X 1.5v Batteries (batteries Not Included)