WD Purple WD43PURZ 4TB 5400RPM 256MB 3.5" Surveillance Internal Hard Drive Fold 5 *This case does not include

*This case does not include the screen protector

enables dual-plane balancing and RAID optimisation in multi-bay environments

DuoLink™ Audio Sharing:

Support for both Chinese and English prompt tones: double-click the multifunction key in unpaired state

HP SERIES 5 PRO

WD Purple WD43PURZ 4TB 5400RPM 256MB 3.5" Surveillance Internal Hard Drive Fold 5 *This case does not includeWD Purple drives are designed to meet the challenges of 24x7 video surveillance recording. These 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 drives, you get reliable, surveillance