Item Type: Luminometer_x000D_Material: ABS_x000D_Model: GM1020_x000D_Power Supply: 1.5V 3 x AAA Battery (Battery Not Included)_x000D_Purpose: Illumination Measurement_x000D_Measurement Object: Illuminance and temperature difference, maximum/minimum illuminance temperature, integrated illuminance and integration time, average integrated illuminance_x000D_Optoelectronics: Silicon Diode_x000D_Thermal Probe: NTC Thermistor_x000D_Measuring Range: 0-200.000Lx_x000D_Divided into 4 ranges:_x000D_X1 0: 199.9Lx_x000D_X10: 200 1999.9Lx_x000D_X 100: 2000 19999.9Lx_x000D_X 1000: 20000 200000Lx_x000D_Temperature Range: 0-40_x000D_Illumination Accuracy:_x000D_3%(Below 10000Lx)_x000D_4%(Above 10000 Lx)_x000D_Temperature Accuracy: 1.0_x000D_Operating Temperature/Humidity: 0-40, 10-90%RH_x000D_Storage Temperature/Humidity: -20-50, 10-90%RH 1Digital illuminance meter, multi?function, to meet the basic light measurement needs. 2Measure illuminance and temperature difference, maximum/minimum illuminance temperature, etc. 3Using NTC thermistor probe, high accuracy, measuring range is 0?200.000Lx. 4Support automatic storage of illuminance data and manual storage of illuminance data. 5The use of computer?based analysis software enables users to easily operate the meter. 1 x Luminometer (Battery Not Included) 1 x Toolbox 1 x English Manual 1 x Data Line 1 x CD