The RJ4040 RuggedJet Mobile Printer With Wi-Fi from Brother takes the convenience of mobile printing to a new level with its 6.0′ shock resistant design. The printer’s thermal format obviates the need for ribbons and ink, all you need is thermal paper. The printer’s compact size and light weight makes it easy to bring along with you wherever you go. The printer supports media up to 4.0″ wide, ideal for printing labels and receipts. In addition to printing documents, the RJ4040 can print most barcode formats, convenient for keeping track of invoices, inventory, and other crucial items.