Features: The luxmeter is designed according to health and measurement requirement of industrial safety. Maximum value measurement, minimum value measurement and normal measurement are switchable by pressing a button. Large display for easy and clear reading, and supports back light function. Portable luxmeter is convenient to use, with high precision and fast response. It can be widely used in lamp Industry, offices, families, warehouses, schools, road lamp construction and laboratories, etc. Specifications: Sampling speed: 0.5 seconds Range: 0~2000X100LUX Degree of accuracy: (＜10000LUX),±(4%rdg+10dtgs); (≥10000LUX),±(8%rdg+10dtgs); Sensor type: Silicon photocell Resolution ratio: 0.1(＜200); 1(200~9999) 10(10000~99999); 100(≥100000) Automatic power off: About 16 minutes (no key operation) Energy provision: A 9V battery(NOT included) Energy life: about 50 hours (alkaline battery); Operation temperature: 0~50℃ Operation humidity: 10%~80%RH Storage temperature: -10~60℃ Storage humidity: 10%~75%RH Size: 21.3*5.5cm/8.4*2.2in Weight: 140g(approx.) Package Includes: 1 x Luxmeter (battery is NOT included) 1、The luxmeter is designed according to health and measurement requirement of industrial safety. 2、Maximum value measurement, minimum value measurement and normal measurement are switchable by pressing a button. 3、Large display for easy and clear reading, and supports back light function. 4、Portable luxmeter is convenient to use, with high precision and fast response. 5、It can be widely used in lamp Industry, offices, families, warehouses, schools, road lamp construction and laboratories, etc.