Feature:1. It has a reading lock function, which locks the measured value and facilitates the reading of the measured value.2. LX1010B 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.Specification:Item Type: Luminometer Material: ABSColor: As shown in the pictureProduct Model: LX1010BDisplay: 3-1/2 digits 18mm LCDMeasuring Range: 0 Lx~50000LxSampling Rate: 2.0 times/secAccuracy: 4%rdg0.5%f.sPhotoreceptor: Light diode with filter lensWorking Environment: 0~40 (32~104) 0~70%RhStorage Environment: -10~50 (14~140) 0~80RhBattery: 1 x 9V 6F22 battery (not included).Package List:1 x Luminometer (Battery Not Included)1 x Instruction ManualNote:1. The instrument should be kept clean, especially the light detector. If there is any dirt, wipe it with a clean soft cloth to avoid affecting the accuracy of the measurement.2. The reference level of the light source test should be at the top of the light receiving sphere.3. Avoid beating and high strength vibration.4. This meter is a precise measuring instrument. It should not be used in places with strong corrosiveness such as acids and alkalis and places with high temperature and high humidity (such as bathrooms) to avoid damage.5. If the meter will not be used for a long time, please remove the battery to avoid damage to the meter due to battery leakage.6. The sensitivity of the photometer will be reduced due to the conditions and time of use. It is recommended that you calibrate the meter regularly to maintain the basic accuracy.