WD Purple Surveillance HDD 2TB SATA 6 Gb/s, 64 MB Cache

Interface: SATA_x000D_\nType: SATAIII_x000D_\nCapacity: 2 TB_x000D_\nDisk Speed (RPM): 7200rpm_x000D_\nForm Factor: 3.5 Inch_x000D_\nCompatibility: WD Purple™ surveillance storage is built to handle up to 64 cameras per drive and is designed for 24/7, always on, high-definition surveillance security systems with more than eight bays._x000D_\nDimensions (L X W X H): 5.79″ x 4″ x 1.03″