This Total Micro 4GB 2400MHz Unbuffered Non-ECC 1.2V 260-Pin SO-DIMM memory module meets or exceeds OEM specs and is for the HP EliteBook 725 G4, 745 G4, 755 G4, 840 G4, 850 G4, ProBook 430 G4, 450 G4, 455 G4, 470 G4. Lifetime limited warranty