0-50,000 Lux in 3 ranges, Accuracy: ±5% + 2 digits Sensor uses an exclusive photo diode and multicolor correction filter, spectrum meets C.I.E standard Precise and easy readout, wide range Compact and lightweight. Carry case included. Separate light sensor allows user take measurements at an optimum position This handheld Lux Meter measures 0-50,000 Lux in 3 ranges with Accuracy: ±5% + 2 digits. It features a separate light sensor, allowing you to take measurements at an optimum position. The sensor uses an exclusive photo diode and multicolor correction filter with a spectrum that meets C.I.E standard. The readout is precise and easy to see even when in bright ambient light. Compact and lightweight, it weighs only .36 lb with a battery installed. A carry case, instruction manual, and calibration certificate are included. Powered by one 9V battery (not included). This meter is ideal for photography, lighting industry, agriculture, scientific research, and teaching.