1Storage 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 lowlight 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 handheld in many situations. Item Type: Luminance Meter Product Size: Approx. 14.5x6.7x2.8cm / 5.7x2.6x1.1in Material: ABS Battery: 3x1.5V AAA Battery (Battery Not Included) Illuminance Measurement Range: 0-200000Lux/0-20000Fc Measurement Accuracy: 3%+5dgts/4%+10dgts Temperature Measurement Range: -20-50C/-4-122F Weight: Approx. 745g / 26.3oz Measurement Accuracy: 1 Resolution: 0.1Lux/1Lux/0.1 Repeatability: 2% Refresh Rate: 2 Times/Sec Illuminance Unit/Temperature Unit: Lx/Fc C/F Illuminance Probe: Silicon Photodiode Temperature Probe: NTC Thermistor Data 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. 1 x Illuminance Meter (Battery Not Included) 1 x Connection Line 1 x Manual 1 x Storage Box