WD Purple Surveillance Hard Drive 4TB WD43PURZ Features: Industry-Leading Storage. Surveillance You Can Trust Western Digital has provided surveillance-grade storage for more than a decade. With WD Purple surveillance storage, drives are engineered for high temperature, always-on surveillance systems so you can rely on quality video when you need it most. WD Purple delivers smart video storage that you can trust and are backed by a 3-year limited warranty. Western Digital's Exclusive AllFrame™ Technology All WD Purple drives are equipped with AllFrame™ technology, which helps reduce video frame drops and improves video recording and playback. Enhanced Workload Ratings WD Purple drives feature a workload rating of up to 180TB/year - up to three times that of desktop drives - to handle the unique demands of mainstream video surveillance DVR and NVR systems. Multiple Cameras, Multiple Streams Modern recorders now support multiple video streams per camera. WD Purple drives support up to 64 single-stream HD cameras. With so many options, you have the flexibility to upgrade or expand your security applications in the future. Designed for Surveillance Solutions With an MTBF of up to 1 million hours, WD Purple drives are engineered for mainstream surveillance DVRs and NVRs that operate 24/7. With tarnish-resistant components and support in storage systems with more than eight drive bays, WD Purple drives deliver reliable operation even in harsh environments. Wide Compatibility. Seamless Integration WD Purple hard drives are built with compatibility in mind, so you can quickly and seamlessly add capacity to your surveillance system. With a wide range of industry-leading enclosures and chipsets supported, you’re sure to find the DVR or NVR configuration that’s right for you. Three-Year Limited Warranty As an industry-leading hard drive manufacturer, Western Digital stands behind their surveillance storage solutions with a 3-year limited warranty included with every WD Purple drive. Specifications: General Capacity 4TB Form Factor 3.5-Inch Connector SATA Interface SATA Transfer Rate up to 175MB/s Recording Technology CMR Cache Size 256MB Warranty 3-Year Limited Warranty Dimensions (L x W x H) 5.79" x 4" x 1.03" Weight 570gms Operating Temperature 0°C to 65°C Non-Operating Temperature -40°C to 70°C Certifications BSMI, ICES-003/NMB-003, CE, FCC, KC, Maghreb, RCM, UKCA, VCCI, CB-Scheme, TUV, UL Compatibility Up to 64 HD cameras Up to 16 drive bays AllFrame firmware technology In The Box WD Purple Surveillance Hard Drive