Material: ABS
Measurement Function: Illuminance and Temperature, Illuminance Difference, Illuminance Maximum and Illuminance Minimum
Illuminance Probe: Silicon Photodiode
Temperature Probe: NTC Thermistor
Illuminance Range: Total Range: 0~200,000Lx
Divided into 4 Levels:
1: 0~199.9Lx Minimum  Resolution: 0.1Lx 
10: 20.0x10~199.9x10Lx Minimum  Resolution: 1Lx 
100: 20.0x100~199.9x100Lx Minimum  Resolution: 10Lx 
1000: 20.0x1000~199.9x1000Lx Minimum  Resolution: 100Lx 
Illumination Accuracy: 
1: ±3%rdg+5dgts 
10: ±3%rdg+10dgts 
100: ±4%rdg+10dgts 
1000: ±4%rdg+10dgts
Temperature Range: -20 ~ 50C (-4~122F)
Temperature Accuracy: ±1.0C
Repeatability: ±2%
Refreshing Rate: 2 Times/Sec
Illumination and Temperature Unit: Lx (lx)/C (degrees Celsius) Lx (lx)/F (degrees Fahrenheit) FC (foot candles)/C (degrees Celsius) FC (foot candles)/F (Fahrenheit)
Illumination Data Storage: maximum storage of 2000 (automatic storage) maximum storage of 60 (manual storage)
Power Supply: 3 x 1.5V AAA Dry Battery (Battery Not Included)

how to Use:
1: Open the illuminance meter receiving cover
2: Install the battery 3 x 1.5V AAA (this product does not include)
3: Press the power button and move the receiver as close as possible to the measured light source (the gear is automatically adjusted according to the strength of the light source)