Featuring a 4 inch width (101.6mm) print head, the QL-1100 offers maximum compatibility with third party shipping label software packages from couriers and parcel delivery companies. This printer has full PC and Mac compatibility thanks to its USB connection, and the free P-touch Editor label design software lets you add text, images and barcodes to your labels. The QL-1100 can easily be integrated into your own systems and software using the Windows SDK (Software Development Kit).