Service type: Next Business Day, Number of years: 3 year(s), Type: On-site, On-site support: Yes, Compatibility: ProBook 640 G2/G3/G4, ProBook 645 G4, ProBook 650 G2/G3/G4, ProBook 655 G3. When hardware issues come up, the sooner you can get running again, the better. Have expertise at the ready with HP Hardware Next Business Day[1] Onsite Service, and vastly improve your product uptime.