Dell upgrade 1r. PS na 4r. PSP

Dell warranty extension from 1 year ProSupport to 4 years ProSupport Plus for XPS 13 7390, 13 7390 2in1, 13 9300, 13 9380, 13 9390, 15 7590, 15 9500, 17 9700, 13 9310, 13 9365, 13 9365 2-in-1, 13 9370, 15 9570, 15 9575, 15 9575 2-in-1,9310 2-in-1, 13 9305, 9310, 9510, 17 9710 - Must be purchased together with a new device - Cannot be applied to warehouse stock