YF-172 LCD Display Digital Lux Meter Illuminometer Light Meter DISPLAY: - 3 1/2 digits LCD with maximum reading 1999. - Overload indication. - Low battery indication. FUNCTIONS: - According to JISC1609:1993 general A class (CNS A Level) A class specifications. - Spectral response close to CIE luminous spectral efficiency. - Measuring intensities of illumination in unit of Lux or Foot-candle. - Measuring lights source include all visible range. - Length of wire for light sensor: approximately 1.5M. Light Source Selecting Tungsten/Daylight, Fluorescent, 0~8 select rating Measuring range 200, 2,000, 20,000, 50,000 Lux, 20, 200, 2,000, 5,000, Foot-candle Accuracy +/-3% (Calibrated to standard incandescent lamp 2856 K) and corrected LED day while-light spectrum. +/-6% (other visible light source) Meter size (LxWxH) 200x98x40mm Sensor size (LxWxH) 125x98x40mm Weight (including battery) 325g The package not included batteries.