We’ve all heard about surveillance drones, but those are usually matters of international espionage, not security for your home. Amazon‘s Ring wants to change that: the company today announced the Always Home Cam, a drone that helps you keep an eye on your home while you’re gone. It sounds like something out of a futuristic sci-fi movie, but it’s arriving next year for $250. The drone is able to operate autonomously, though users can direct it to different rooms and paths. Like vacuum robots, it maps your home so you can tell it where to go without it bumping into…

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