Features Simultaneous display of Foot Candles or Lux and lighting type Large 1.4" (1999 count) LCD display % displays differential from reference point "ZERO" Re-Calibration Utilizes precision photo diode and color correction filter Cosine and color corrected measurements ±4% accuracy is enhanced by selecting lighting type (Tungsten/Daylight, Fluorescent, Sodium, Mercury) Record/Recall MIN, MAX and AVG readings, Data Hold plus Auto shut off Built-in RS232 serial interface, optional software Specifications Fc Range: 200, 2000, 5000Fc Lux Range: 2000, 20000, 50000Lux Max. Resolution: 0.1Fc/1Lux Basic Accuracy: ±4%FS Cosine & Color Corrected: Yes PC Interface: Yes Dimensions/ Weight: 7x2.9x1.3" (178x74x33mm)/ 1.6lbs (726g) This 407026 Heavy Duty Light Meter has 4 lighting type settings for enhanced accuracy (Tungsten/Daylight, Fluorescent, Sodium, Mercury). Additional features include Data Hold, Min/Max/Average, Auto power off and a % reading of the differential from a reference point. Built-in RS-232 interface with optional Data Acquisition Software and Data logger. Complete with 9V battery, light sensor with 45" (1.1m) cable, protective cover, and holster with stand.