DT‑73L Illuminometer Mini Digital Light Illuminance Meter with 4 Digit LCD Display for Light Strength Measure Item Type: Illumination Material: ABS Model: DT-73L Battery: 3 x AAA 1.5V (Not Included) Purpose: Illumination Measurement Illuminance Measurement Range: 0-200KLx/0 ~20KFC Illuminance Measurement Resolution: 0.1Lx/0.01FC Illuminance Measurement Accuracy: ±4%rdg±10dgt(<10,000Lx) ±8% rdg ±10dgt (10,000Lx) Display: 4 Digit LCD Display with Back Light Low Battery Power Prompt: When the Low Battery Sign (Battery) Appears, It Prompts That the Battery Needs to Be Replaced Operating Environment: 0-50°C/32-122°F <80%RH Non Condensing Storage Environment: -10-60°C/-14-140°F «99%rh Non Condensing Automatic Shutdown: When the Automatic Shutdown Function is Turned On, It Will Automatically Shut Down After 10 Minutes of Inactivity Relative Value: √ Minimum, maximum Value: √ Data Retention: √ Automatically Switch Gears, units: √ Back Light: √