Electronic HP Care Pack Next Business Day Hardware Support with Defective Media Retention - Extended service agreement - parts and labor - 3 years - on-site - 9x5 - response time: NBD - for LaserJet Enterprise MFP M634; LaserJet Enterprise Flow MFP M634, MFP M635, MFP M636. The Electronic HP Care Pack Services (e-Care Pack) capability allows you to order, receive, update, and activate a wide range of valuable HP Care Pack Services over the Internet. Administered through the HP Services Network (CSN), it is a fast and simple process that enables immediate registration and service activation.