multiple functions: Has reading data hold function, maximum or minimum value display, automatic power off Scope of application: SMART sensor lux tester can be widely used for light measurement in homes, supermarkets, offices, schools, hospitals, factories, etc. Lightweight and compact: Handmade design and small size make the meter light, it is easy for you to use to transport; Compact and ergonomic design makes the meter fit the hand perfectly, providing a comfortable grip feeling Wide measuring range: Measuring range 1 ~ 200,000 Lux. switchable measuring units: Lux and Fc. Temperature range: -10 ~ 50 ℃ / 14 ~ 122 ℉ main functions: AS813 Lux Light Meter is used to measure visible light produced by fluorescent lamp, metal halide lamp, high voltage sodium lamp or incandescent electric lamp for vivid and intuitive image display. p Features: Model: AS813. Color: show in pictures. Size: 162 * 47 * 25 mm. Material: plastic. Measuring range: 0-200,000 Lux. Accuracy: plus minus5% DGR, plus minus10dgts. Unit of measure is switchable: Lux or FC. MAX / MIN / Data Hold functions. Temperature range: -10 to 50 ℃ / 14-122 ℉. Power supply: 3 * 1.5V AAA batteries (not included). Package includes: 1 * AS813 Lux digital meter. 1 * User manual . Note: it does not include other things, the color is based on the first picture, and other pictures only show the effect Due to the differences between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement. Please allow deviation. Thank you!