Speed traps often show up at the bottom of a long downhill, when you’ve gained speed without even realizing it. While it’s important to drive responsibly no matter what, a radar detector can remind you to pay attention to your speedometer’s reading. And if you’re wondering if radar detectors are legal, you’re in luck: they are in most of the U.S.

A radar detector can sense the radar signals used by speed-checking devices, helping you stay aware of upcoming speed checks. When choosing a new radar detector, review the frequency specifications to understand what the device can detect.

Many users mount the detector on the dashboard or windshield. You can also position it in the center console. Use radar installation parts like mounts and cords to keep your radar scanner secure while driving, and consider using car electronics professional installation for the easiest experience.

Two important things to consider when choosing a good radar detector for car or truck use are the detector’s strength and its directionality. Unsurprisingly, the most powerful and advanced radar detectors are usually the most expensive ones.

Some of the top radar scanners include smart features, letting you use them with Apple CarPlay, Android systems or their own dedicated app. These smart radar detectors can even connect to Wi-Fi for automatic updates and route information. Choosing a radar detector with GPS can reduce false alerts in dense and high-traffic areas, such as cities and towns.

While you are outfitting your car for more advanced driving, you may consider other great car tech devices, such as a dash cam, cell phone car mounts, a remote start or car security system, hands-free Bluetooth devices or a breathalyzer to ensure you’re driving under the legal limit.