This practical mini lux meter is stable, safe and reliable to measure light illuminance, it also can show you the ambient temperature. It is widely used in lamps, husbandry, industrial and mineral industries, laboratory and office, etc. Features: Mini lux meter with stable, safe and reliable measurement. Wide measurement range 0-200,000 lux and automatic/manual range shift. Measuring unit is switchable: Lux or FC. MAX / MIN / Data Hold functions, high accuracy. LCD display with backlight for easy operation in darkness. Low battery indication & Auto power off, energy saving. NOTE: When measuring under MAX mode, the meter will only display the value greater than the current value; when measuring under MIN mode it will only display the value less than the current value. Specifications: Brand Name: SMART SENSOR Color: Black Material: ABS Plastic Measuring Range: 0-200,000 Lux Resolution: 1 Lux Accuracy: plus or minus 5%rdg plus or minus 10dgts Temperature Range: -10~50 degree Celsius / 14~122 Fahrenheit degree Sampling Rate: 1.5 times/sec Measurement Repeatability: plus or minus 2% Operating Temperature: 0-50 degree Celsius ( less than or equal to 80%RH non-condensing) Storage Temperature: -10-50 degree Celsius ( less than or equal to 70%RH non-condensing) Power Supply: 3 * 1.5V AAA Batteries (Not Included) Item Size: 16.5 * 5 * 2.7cm / 6.50 * 1.97 * 1.06in Item Weight: 86g / 3.03oz Package Size: 22 * 14.5 * 3.2cm / 8.66 * 5.71 * 1.26in Package Weight: 122g / 4.30oz Package List: 1 * Digital Lux Meter 1 * String 1 * User Manual