... PLU report, PLU stock report, Stock warning report.*34 keys mechanical keyboard, rational and artistic design that easy for user operating. Keys ... printing, Printing speed: 50mm/s, Paper wide:57mm 3. Keyboard: Type: mechanical keyboard, dustproof and waterproof, up to 15 million times click.4 ... Ports: 1*RS232, 1*PS/2 (for barcode scanner or keyboard), 1*Cash drawer port Optional: 1*USB, 1*RJ45 Ethernet ...