WD Purple drives have been engineered specifically for the extreme demands of high temperature, 24/7 surveillance systems. From a worldwide leader in the storage industry, WD Purple is engineered for quality video playback when you need it most. WD Purple drives are optimized to support up to 64 cameras, giving you flexibility to upgrade or expand your security system. With A Wide Range Of Industry-Leading Enclosures And Chipsets Supported, You're Sure To Find The Configuration And Compatibility That's Right For Your Nvr. Low Power Consumption Is A Must In A High-Temperature, Always-On Surveillance Environment. Intelliseek Technology Helps Reduce Damaging Ambient Noise And Vibrations. The WD Purple Drive Is Designed For Both Dvr And Nvr Security Systems, And Is Compatible With Many Of The The Leading Surveillance And Security Manufacturers. We Can Help You Find The Perfect Storage For Your System. 02 Years Warranty