Significant design advances in WD's hard drive technology, combine optimized AV performance with best-in-class power consumption and thermally optimized operation enabling unparalleled cost of ownership for manufacturers of digital video recording devices. With a MTBF of 1 million hours, these drives are designed to last in high temperature always-on streaming digital audio/video environments such as PVR/DVR, DVR recorders, and surveillance video recorders. Noise levels have been minimized to less than one sone - virtually below the threshold of human hearing. WD AV drives deliver best-in-class low power consumption for reduced system power requirements and increased reliability. Tested for compatibility in a broad range of AV products including set top boxes, DVD recorders, and mainstream surveillance systems.