Light Meter All Visible Light Lighting Types Measuring Range 0 to 10 000 FC 0 to 100 000 Lux Resolution 0.1Fc/1Lux Accuracy +/-4 Percent Display 9 999 Count Backlit LCD Data Hold Yes Min./Max. Memory Yes Data Logging 20M Readings Using The Included 2G SD Card Interface SD Card and RS-232 2G SD Card Memory Auto Power Off Yes (6) AA Battery Type Photo Diode And Color Correction Filter Spectrum Designed To Meet CIE Sensor Cord Length 39 in