54-22098-01 VIDEO OPTION MODULE FOR DEC VT510 OR VT520 VIDEO TERMINALS,  ASSEMBLY# 50-22097-01,  FULLY FUNCTIONAL,  GOOD GREAT COSMETIC CONDITION,  30 DAY WORKING/REPLACEMENT WARRANTY.  PLEASE MESSAGE OR CALL KEVIN AT [phone removed by eBay]  IF YOU HAVE QUESTIONS ABOUT PART LISTED, OR FOR SHIPPING COST TO LOCATIONS OUTSIDE THE CONTINENTAL UNITED STATES.