Amazon has a half-off deal for Prime members on a Blink outdoor / indoor security camera bundle. The sale gives you a pair of Blink Outdoor 4 cameras, which launched last month, and a Blink Mini for only $117.49. Whether these are your first security cameras or you're adding to an existing setup, this is a chance to save 50 percent off their usual cost. The Blink Outdoor 4 is a wireless device that, despite its name, can work as an inside or outside camera. It supports person detection, which uses computer vision to alert you when it spots a human in its field of view (if you also subscribe to an optional Blink subscription).