RS-232C 19.2 K INTERFACE BOARD FOR MICROLINE 300,300 TURBO & 500 SERIES PRINTERS PLEASE CALL MARC @ 718-645-1001 FOR ADDITIONAL DETAILS RS-232 serial interface board lets multiple users share a printer at a speedy 19.2 kbs. PLEASE CALL MARC @ 718-645-1001 IF YOU HAVE ANY QUESTIONS