1、Professional: Using micro controller processing technology and high accuracy illuminance sensor to make measurement faster and more accurate. 2、Free Switching: The illuminance value can be switched between Lx and FC units by pressing the button, and four gears can also be switched by pressing the button. 3、High Performance: It has the functions of maximum value, minimum value measurement mode, REL relative value measurement mode and HOLD mode. 4、Multi Function: It also has automatic shutdown function, backlight function, low battery prompt function, to provide convenience for your use. 5、High Quality Material: The body uses high quality ABS material, which is environmentally friendly and wear resistant, and has a long service life. 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: √ 1 x Illuminometer 1 x Manual