This practical lux meter is stable, safe and reliable to measure light illuminance, it also can show you the ambient temperature. It is widely used in science and industry. Applications included used in homes, offices, school businesses, road light construction and laboratory etc. Features: Mini lux meter with stable, safe and reliable measurement. Wide measurement range 1-200,000 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. Data hold with Maximum and Minimum. Compact Size and Light Weight: you can hold and carry it conveniently. Specifications: Brand Name: SMART SENSOR Color: Black Material: ABS Display: LCD Display Measuring Range: 1-200,000 Lux Resolution: 1 Lux Accuracy: 10,000 Lux(±4%rdg±10) 10,000 Lux(±5%rdg±10) Temperature Range: -1050 / 14122 Refresh Rate: 2 times/sec Repeatability: ±2% Operating Temperature & Humidity: 0-40 (≤80%RH non-condensing) Storage Temperature & Humidit: -10-50 (0-90%RH) Power Supply: 3 * 1.5V AAA Batteries (Not Included) Item weight: 95g/0.21lb Item size: 17*5*2.8cm/6.69*1.97*1.1in Package weight: 169g/1.37lb Package size: 19.5 * 7.5 * 3.5/7.68*2.95*1.38in NOTE: Please don't store it at high temperature or humidity, high concentration salt or sulfur environment. If don't use it for a long time, please take off the battery to prevent leakage of battery. Please allow 1-3cm differences due to manual measurement. Package list: 1 * Digital Lux Meter 1 * String 1 * User Manual(English)