1,Large‑capacity automatic storage and memory function, with automatic storage of illuminance data (maximum 1900 groups), by default, it is stored once per second. 2,Lightweight and portable, light weight, small size, more convenient transportation, easy to carry out to measure strong and weak light. 3,The 0.1LX high accuracy illuminance meter, scientific design makes the test easier, and you can get results quickly. 4,Data retention makes debugging more convenient, and there is no need to worry about data loss. And the data mining function has been tested and can be used with confidence. 5,Convenient to use, with PC analysis software, easy to use, can export text curve graphic analysis, and print test data. Item Type: Luxmeter Material: Plastic Weight: Approx. 694g or 24.5oz Product Size: Approx. 14.5x5cm or 5.7x2.0in Measuring Range: 200000Lx Measurement Error: <10000Lx error ±3 percent >10000Lx error ±4 percent Sampling Rate: 2 times or sec Photometric Probe: Silicon diode Temperature Probe: NTC thermistor Temperature Range: 0-40℃ Temperature error: ±1℃ Unit conversion: Lx or Fc Data storage: 1900 groups Working Temperature: 0-40℃ Product Power Supply: 2xAAA batteries (delivered without batteries) Illumination data storage, query and delete functions: 1. Automatic storage of illuminance data (maximum storage of 1900 groups), query and delete functions 2. Manual storage of illuminance data (maximum storage of 60 groups), query and delete functions 1 x Illuminance Meter 1 x Plastic Storage Box 1 x USB Data Cable 1 x Manual Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.