The Milestone Husky™ M500 /M550 Advanced NVR 's go beyond the ordinary all - in - one network video recorders (NVRs). Designed in a 2U rack form factor, the y are purpose built high - performance surveillance recordi ng hardware platform s . The M500A has a guaranteed support o f 600Mb/s recording rate. The M55 0A has a guaranteed support of 1400Mb/s recording rate. Preloaded with Milestone XProtect Advanced VMS software, the unit s combine comprehensive video surveillance functions and high performance, with low total cost of ownership. This makes the m the most versatile and capable recording platform s available with Milestone XProtect software.