1、It has a reading lock function, which locks the measured value and facilitates the reading of the measured value. 2、LX‑1010B measuring range is 0Lx~50000Lx, the product has high measurement accuracy and quick response. 3、Digital display large screen, screen display symbol and unit, easy to read, and can be automatically returned zero. 4、Powered by a 9V battery(not included), this unit has low energy requirements and will last you for a long time out in the field without needing a change. 5、With a fast sampling rate of 2.0 times/sec, you'll never be stuck waiting for your reading to come through. Item Type: Luminometer Material: ABS Color: As shown in the picture Product Model: LX1010B Display: 3-1/2 digits 18mm LCD Measuring Range: 0 Lx~50000Lx Sampling Rate: 2.0 times/sec Accuracy: ±4%rdg±0.5%f.s Photoreceptor: Light diode with filter lens Working Environment: 0℃~40℃ (32℉~104℉) 0~70%Rh Storage Environment: -10℃~50℃ (14℉~140℉) 0~80Rh Battery: 1 x 9V 6F22 battery (not included) 1 x Luminometer (Battery Not Included) 1 x Instruction Manual