24 Columns Alphanumeric High Speed Impact Printer runs using built-in 1.8 Ahr NiMH battery. The Alphanumeric High Speed Impact Printer functions with a speed range of 2.7 Lines/second. The Alphanumeric High Speed Impact Printer is provided with 8 Hours battery backup and is fitted with RS-232 serial port. 24 Columns Alphanumeric High Speed Impact Printer is available in rugged acrylonitrile butadiene styrene case.