54-23452-01 VIDEO OPTION MODULE FOR DEC VT510 OR VT520 VIDEO TERMINALS,  FULLY FUNCTIONAL,  REFURBISHED,  30 DAY WORKING/REPLACEMENT WARRANTY.  PLEASE MESSAGE OR CALL KEVIN AT [phone removed by eBay]  IF YOU HAVE QUESTIONS REGARDING PRODUCT LISTED, OR FOR SHIPPING COST TO LOCATIONS OUTSIDE THE CONTINENTAL UNITED STATES.