Founded in 1948, Cobra is a professional manufacturer of laser and radar signal detectors in North America, and the only publicly traded company in the radar detector industry. As a company with a background in military technology, Cobra has a 60% sales share in the United States, a sales network in 76 countries and regions around the world, and has been leading the cutting-edge technology of radar detectors for more than 50 years, and many of its technologies are still leading the world. The SPXc 5700 and 5800 are equipped with Chinese and English voice broadcast functions, and the high-end version also adds cellular data, which can share the location information of the measured mobile speed measurement point with other users in real time, and the price ranges from 1000-3000 yuan.