QLn220 Direct Thermal Mobile Printer (USB, 802.11a/b/g/n Dual Radio, BT3.0 + MFi) Trust these drop-resistant mobile printers to improve efficiencies throughout operations in the warehouse, shipping and receiving and merchandising. Quickly and easily print barcode labels, receipts, tickets and more, on-site and on-demand. The QLn Series mobile printers feature the latest technology.