Features:  Mini lux meter with stable, high accuracy, safe and reliable measurement.  Wide measurement range 0-199,900lux with switchable measuring unit of Lux or FC.  MAX / MIN / Data Hold functions, automatic measurement, low battery indication.  LCD display with backlight for easy operation in darkness.  Compact size and light weight so you can hold and carry it conveniently.  Widely used for monitoring light intensity in homes, laboratories, office, schools, indoor farming, etc.    Specifications:  Material: ABS plastic  Display: 4 digit LCD display, Max. reading 9999  Measuring Range: 0 Lux~199,900K Lux  Resolution: 0~9999: 1Lux, ≥10000: 10Lux    Accuracy: ±4% rdg±8d (<10,000Lux), ±5% rdg±10d (≥10,000Lux)  Sampling Time: 0.5s  Auto Power Off: 5minutes  Sensor Type: Silicon photovoltaic cell  Drop Proof: 1m  Data Hold Function: Yes  MAX/MIN Record: Yes  Operating Conditions: 0℃～40℃(≤80%RH)  Storage Conditions: -20℃～60℃(≤75%RH)  Power Supply: 3 * 1.5V AAA battery (NOT included)  Item Size: Approx. 179 * 64 * 27mm / 7.05 * 2.52 * 1.07in  Item Weight: Approx. 135g / 4.78oz  Package Weight: Approx. 297g / 10.48oz  Package Size: Approx. 23.3 * 18 * 5.5cm / 9.18 * 7.09 * 2.17in    Package List:  1 * Digital Lux Meter  1 * User Manual(English)