Features1Storage function, it has two recording modes: automatic storage of illuminance data (maximum 2000 groups) and manual storage (maximum 60 groups). 2Auto range, it can automatically confirm and convert the corresponding range, helping to make the measurement easier. 3Responsive, it can quickly translate the light, and can also measure low?light environments. 4Backlit screen function, it can be easy to operate in the dark, providing more practicality. 5Small in size, it is lightweight and portable, and can be used hand?held in many situations.SpecificationItem Type: Luminance MeterProduct Size: Approx. 14.5x6.7x2.8cm / 5.7x2.6x1.1inMaterial: ABSBattery: 3x1.5V AAA Battery (Battery Not Included)Illuminance Measurement Range: 0-200000Lux/0-20000FcMeasurement Accuracy: 3%+5dgts/4%+10dgtsTemperature Measurement Range: -20-50 DegreeC/-4-122 DegreeFWeight: Approx. 745g / 26.3ozMeasurement Accuracy: 1Resolution: 0.1Lux/1Lux/0.1Repeatability: 2%Refresh Rate: 2 Times/SecIlluminance Unit/Temperature Unit: Lx/Fc DegreeC/ DegreeFIlluminance Probe: Silicon PhotodiodeTemperature Probe: NTC ThermistorData Storage: automatic storage up to 2000 groups, manual storage up to 60 groups.Measurement Items: It can be used to measure the maximum measurement, minimum measurement, difference measurement, and integral illuminance measurement.Package List1 x Illuminance Meter (Battery Not Included) 1 x Connection Line 1 x Manual 1 x Storage Box