Measures even in low light conditions. Its lar ran of 0~200000Lux can meet the measurement requirements of users in different environments. The maximum or minimum value displayed by the instrument will chan according to the real-time measurement results, and the user can obtain the maximum or minimum illuminance value currently measured at any time. Up to 60 data can be recorded. At the same time, the instrument can automatically calculate the avera value. After the user has recorded the data, the avera value of these data can be obtained as long as he enters the avera value viewing interface. During measurement, the distance between the probe and the object to be measured can be adjusted flexibly. Small body and easy to carry