1. Specially designed to measure traffic signs. 2. Elegant appearance combines ergonomic design 3. 45°/0 geometry optical structure, conform to standard CIE, ISO, ASTM and DIN, incomparable accuracy. 4. 3.5" ultra-large touch-screen makes the operation interface quite friendly. 5. Two kinds of standard observer angles, multiple light sources, multiple color spaces and multiple color difference formulas, fit for all kinds of color measurement requests.