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Tzumi On Air Intellitrack 10 in. Ring Light with Motion Tracking IPhone Holder with Ring Light 8308HD - The Home Depot
NightWatcher Security 220-Degree Outdoor Black Motorized Motion-Tracking LED Security Light with Built-in Security Camera NW700BK - The Home Depot
New system allows for high-accuracy, through-wall, 3-D motion tracking | MIT News | Massachusetts Institute of Technology