... -232C interface, convient n etworking. 2.Lack of paper automatic alarm. 3.LCD screen display, English menu clew ... free acceleration,2.Electric suction system, internal microcomputer control, automatic feeding paper, measuring, reseting, washing, automatic measurement show one, two,three ... RS-232C interface, convient networking.5.Lack of paper automatic alarm.6.LCD screen display, English menu clew ...