Vehicle Safety Systems - Sound of Tri-State
https://www.soundoftristate.com/car-audio-video-and-navigation/vehicle-safety-systems
Aftermarket cameras, monitors, sensors, and complete systems are available for any type of motor vehicle, including sedans. Backup systems fall into two categories: sensors and cameras. Sensors placed on bumpers use technologies such as ultrasound, lasers, and radar to sense objects around the car and then sound a warning when you come too close. history
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