Ultrasonic technology is great for economically adding a blind spot detection kit to your vehicle, however please note they are prone to more false alarms than microwave rader sensors. Ultrasonic sensors will also require holes to be drilled in the bumper of your vehicle,
and they CANNOT be installed on steel bumpers.
Microwave sensor technology is the best for blind spot detection, as it is 90% more accurate than comparable Ultrasonic technology, requires no holes to be drilled in your bumper,
and can even be added to pick up trucks!