The Quick Scan QM2131 imager's extra-wide field of view & extra-long scan line makes reading long bar codes in closer distances much easier. The sharp & highly visible scan line makes the scanner more user-friendly to use, while the enhanced depth of field enables bar codes to be read at an intuitive distance. The QM2131 linear imager provides secure radio communications with no risk of interference from Wi-Fi infrastructure & very low sensitivity to obstacles like concrete walls, wood or metal shelves.