Uncompromising Storage with a WD Purple Surveillance Hard Drive - WD Purple drives are engineered specifically for surveillance to help withstand the elevated heat fluctuations and equipment vibrations within NVR environments. An average desktop drive is built to run for only short intervals, not the harsh 24/7 always-on environment of a high-definition surveillance system. With WD Purple, you get reliable, surveillance-class storage thats tested for compatibility in a wide range of security systems, and some of our latest models (WD22PURZ, WD42PURZ, and WD63PURZ) have improved power efficiency. Exclusive All - Frame technology helps reduce frame loss and improve overall video playback. - Full SpecificationsFeaturesEngineered for mainstream surveillance systems - WD All - Frame technology delivers optimizations for write-intensive, low bit-rate, high stream-count workloads typical to mainstream surveillance applications - Supports up to 180TB/yr workload rate and up to 16 bays Capacity 1TBForm Factor 3.5-Inch - Connector SATACompatibility Up to 64 HD cameras/ Up to 16 drive bays/ All - Frame firmware technology - Interface SATATransfer Rate up to 110MB/s - Dimensions (L x W x H) 147mm x 101.6mm x 26.1mm - Weight 0.99lbs - Operating Temperature 00C to 650C Non-Operating Temperature -400C to 700CCertifications BSMI, ICES-003/NMB-003, CE, FCC, KC, Maghreb, RCM, UKCA, VCCI, CB-Scheme, TUV, ULMore info: -library/en_us/assets/public/western-digital/product/internal-drives/wd-purple-hdd/product-brief-wd-purple-hdd.pdf