ZB-A colour tester Measure ISO(R457)and Rz,Rx,Rz ... ;lightness L*;chrominance a*, b*;chromaticity C*ab;hue angle h*ab;dominant wavelength λd, excited purity Pe, color difference ΔE ... ab, lightness difference ΔL*, chromaticity difference ΔC*ab, hue difference ΔH*ab, Hunter system L, a,b.2.Measure ISO(R457 ... less than 40mmSize and WeightDimension:360*264*400mmNet Weight:23kg ZB-A colour tester--LCD display