See The 8 Best Radio Scanners on Ezvid Wiki ►►
Fact #1. These scanners are loved by fans of NASCAR. The device allows the listener tune in to car-to-car communications. That gives them access to what the drivers are saying. Seeing what is going on is great. But hearing every in-depth detail about what is going on inside of the vehicle is better.
Fact #2. The earliest example had real crystals inside. Scanners became popular during the CB Radio craze of the 1970s. The first model required crystal radio receivers. That was one of the most popular types of receivers in the early days. A separate crystal was needed for each frequency. The best part is that they only cost around $5.
Fact #3. Plenty of other groups use them as well. Police officers and criminals are obvious examples. They both try to keep tabs on each other. Survivalists and people who expect an impending apocalypse are another group. They insist on preparing in case the grid goes down. Which isn't that far-fetched. Even a natural disaster could see that happen, at least temporarily. They're also popular among self-appointed citizen watchdogs. That's usually to determine police and criminal activity.
Fact #4. They can detect private channels. The FCC licenses out radio frequencies. That's why FM and AM stations are set in a certain range that your car stereo will cycle through. It's also why things like a garage door opener works. They're set in a very small range of frequencies. That's why you can't pick up police activity on your FM radio. These let you bypass those issues.
Fact #5. The market really took off in the late 1980s. Prior to that, most scanners could pick up about 20 channels. In 1986 Radio Shack released the PRO-2004. It was capable of picking up 300 channels. They've only grown from there.