Bad news for privacy fans: The police are getting their hands on a new piece of handheld technology designed to peer through walls.

The highly-sensitive radar can detect movement as subtle as breathing from up to 50 feet away through solid concrete, USA Today and Atlanta's WXIA-TV report.

Obviously, this is a powerful tool that will likely save the lives of many officers on duty. However, it also raises some ethical concerns regarding the U.S. Constitution's Fourth Amendment, which protects people from unreasonable searches and seizures by the government.

As USA Today reports: "The problem isn't that the police have this. The issue isn't the technology; the issue is always about how you use it and what the safeguards are."

The devices cost $6,000 per unit and at least 50 law enforcement agencies -- including the FBI and U.S. Marshals Service -- have already begun rolling them out.

So, just keep that in mind the next time you're treating yourself like an amusement park in the safety and comfort of your home!