DESCRIPTION:1. MAX/MIN modes indicators2. LCD measurement reading3. Auto range indicator4. Power on/off button5. Mode button: short press for change Lux/Fc, long for Max/Min6. Measurement Sensor7. Hold reading flag8. Low power flag of battery9. measurement unit: Lux / Fc.10. Measurement value = reading X10 or X10011. Current Range indicator12. Hold button: short press for hold reading, long for manual ranging Operation:Caution: Do not place the unit in high temperature / humidity environment. Keep the surface of optical detector clean when in use, make sure the reference level is vertically facing the light source. Please cover the protective cap when not in use for the life of meter.Measurement Instructions:1.Remove the protective cap of the unit.2. Power ON the Instrument.3. Select the measurement unit (Lux / Fc).Choose your needed mode ( normal / average / max modes for selecting)4. Make the sensor vertically face the light source. Get the reading.5. Power OFF the instrument, cover the cap.Buttons' Instructions:Power Button: Power ON / OFF.Mode Button: Pressing lightly for choose Lux or Fc.Pressing little longer for change mode normal / max / min modes.Hold Button: short press for holding the LCD reading, long for manual ranging selecting 200-->2000-->20000-->200000-->AutoAuto Power OFF: This instrument will be Auto Power OFF if there is no any button pressing in 15 minutes. This design is for saving battery power consumption.Care and Maintenance:When the instrument is not in use, store the instrument in a stable, dust-free environment out of direct sunlight. Remove the battery from the instrument if it is to be stored for periods of more than one month, or when the low battery power symbol appears on the display.Battery replacementWhen the low battery icon appears on the display, replace the battery as soon as practical.1. Remove the rear battery compartment cover.2. Replace one 9V battery.3. Cover the compartment door. Specifications:Display: Large LCD characters displayRange: 0.1~200,000Lux, 0.01~20,000FcResolution: 0.1Lux / 0.01FcAccuracy: 4%Measurement speed: 2 times / secondUnits: Lux & FcHold function, Auto range & Manual rangeAuto Power OFF: After approx.15 minutesPower Supply: One 9V battery(not included)Low power of battery detectingOperating Environment: 14 to 122F (-10 to 50C), 10%~90%RHDimensions: 145 X 67 X 32mm (5.7" x 2.6" x 1.3")Weight: 170g (6.0 oz)PACAKGE INCLUDED:1*Digital Lux Meter(not include the battery)1*manualNOTE:1. Due to the hand measurement, there may have error measurement about 1-5mm.2.Item color displayed in pictures may be showing slightly different on your computer monitor since monitors are not calibrated same.