Works for Laptop/Notebook, CCTV DVR, USB Enclosure 2.5" Form Factor Low power WD AV-25 hard drives are the cool, quiet and reliable storage choice for demanding always-on read/write applications. With a SATA 3 Gb/s interface, 32 MB cache and up to 500 GB capacity this 2.5-inch drive is Ideal for DVRs, digital video surveillance and other small form factor environments where power consumption is critical. 24x7 reliability - These drives are designed to last in always-on streaming digital audio/video environments such as DVR/PVR, digital video surveillance and other demanding multimedia applications. Optimized for smooth, continuous digital video playback of up to five simultaneous HD streams. SilkStream is compatible with the ATA streaming command set so AV customers can use standard streaming management and error recovery options. Quiet - Noise levels have been minimized to virtually below the threshold of human hearing. Low power consumption - The drive draws less than 2W while operating and a mere 4.75W during spin up. 1TB capacity holds up to 200,000 digital photos, 250,000 MP3 files, and 120 hours of HD video. Recommended use:Laptop / Notebook / MacBook (With 2.5" SATA interface)2.5inch USB External Enclousre,Set-top boxes (PVR, DVR, NVR and IPTV),media serversPS4 Game Console