... 5.5cmPixel Pitch 0.297H*0.297VVisible size47cm*30cmDefault system Windows XPCertificateCE,FCCHorizontal Scanning Frequency30-80KHZVertical Scanning Frequency56- ... -knocking, water and dust proof, if can be used for the various environmentsstandard accessoriesspecification,warranty card,power line ... is the low price, ease of installation, can be used in various grades of the computer. In addition, ...