I have bought three prophet electronic dogs. I can’t remember the model of the first one. I used the Alien ET and the Terminator T-2000 first. After using it, I basically never experienced speeding again. Violation. It can accurately identify fixed and mobile speed measurement, and the signal is sensitive. However, the signal is sensitive and is also susceptible to interference. Based on current experience, if there is an Audi car in front, the alarm will always occur. There are also areas that may be affected by unknown signals.
Overall, it is worth buying, and the manufacturer’s data updates are relatively timely.