This 3.5" internal desktop hard drive is compatible with DVRs, PCs, and CCTV systems. It has a storage capacity of 500GB and is available in larger sizes up to 4TB. The manufacturer warranty is none, but the drive comes from reliable brands such as Western Digital, Seagate, Toshiba, Hitachi, HGST, or Samsung. This hard drive has a metal shielding, temperature sensor, and is shock resistant. It supports various drive types, including HDDs, and has a transfer rate that varies. The rotation speed is either 5400 or 7200RPM, while the read speed varies. It has a cache of various sizes and comes in the SATA III, II, I, and SATA interface. This unit is 150mm long, 100mm wide, and 25mm high.