... of any substances. Such as: powder, board, paper, paste, sheet, clay, etc.Characteristics:² Compact in size, novel in design & LCD display with ... for operating outside or laboratory.² With low voltage indication function remand of users replace battery timely.² With data output interface. Technical ... (Portable Whiteness Meter (WSB-1) ;Measurement Range:0-199;LCD display with suitcase package)