... display screenl USBl Measurement window: Ø20mml Wavelength range: 380nm~760nm l Total uncertainty of wavelength (nm): 1l Wavelength repeatability (nm): ... l Color: X, Y, Z; Y, x, y; L*, a*, b*; L, a, b; L*, u*, v*; L*, c*, h*l Color difference: Δ E (L*a*b*); ΔE (Lab); ΔE (L ... *u*v*); ΔL*, ΔC*, ΔH*l Whiteness: ...