Printer Model Alpha-3R Mobile Printer Print Resolution 203 dpi Print Method Direct Thermal Print Speed 4 ips Maximum Print Width 2.83” Maximum Print Length 90“ Roll Size/Label Roll 57 mm (2.25”) OD Printer Processor 32-bit RISC CPU Printer Memory 4MB Flash Memory, 8 MB SDRAM Interface Options USB 2.0, RS-232, Bluetooth Power Two-cell, 7.4V DC, 2500 mAh Li-ion rechargeable battery Weight (Approximate) 0.55 kg