Project depends on barcode scanner in supermarket.so putting the barcode scanner in four alternate direction in upside 45 degree down and from downside 45 degree up of bothside and barcode scanner in three percent greater than of normal barcode frequency in polyformaldehyde barcode scanner bulb size of 6.83 micrometers. Barcode scanner bulb-polyoxymethylene(40percent glass). Barcode scanner frequency-802.11g.(WLAN). Then decide the amount of the every product .so putting the display in the supermarket bucket.finally depending on the frequency on the bulbscanners,the wavelength will be change with the velocity.