... Maximum, Minimum function Data hold Peak hold Lux meterMS6612 Digital Lux MeterPatented product Environment conditionOperation temp & humidity: 0~40°C(<80% ... appear “1”/“FF”Photo range: 20,200,2000,20000,200000 LUX 20,200,2000,20000FCLow power alarmAuto power offKey voice indicationBattery ...