Well almost the best you can get but for the money you cannot go wrong with this product. This one is pretty high tech and lets you know when the cops are around. These devices are not meant for you to break the law, but more to know that they are around. Also good to know is that it will flash if an emergency vehicle is approaching! This is a necessary feature because if you have your stereo playing and are not looking in the rearview every 3 seconds sometimes you don't realize it until it is too late! Marvelous and necessary for the daily driver, I use mine every single day.