1TB 2.5" Laptop Hard Drive for HP Compaq replaces 634921-001, 634924-001, 634925-001 Interface: SATA, Capacity: 1000GB, RPM: 5400RPM, Cache: 8MB, Size: 2.5 Inchs, 3.0Gb/s or 6.0Gb/s Package Include: 1000GB 5400RPM 8MB Hard Disk Drive This Product Has 3 Years Warranty And 30 Days Money Back Guarantee