Wouldn’t it be nice to answer the door—without having to answer the door? Intercom systems allow you to do just that: have whole conversations with anyone who comes to the door, from the comfort and security of anywhere in the house—and these days, you can even get intercoms equipped with video cameras, so you can see who you’re talking to. This can be useful for safely talking to suspicious callers, ignoring unwanted neighbors, or identifying visitors when you’re sick in bed.
More...