i guess or you could get with her sister or mom... just saying

I am sorry I was not very clear on the laser jammer, but I can tell you about parking sensor works, the desire to help you. Thank you.
Most of the market is now ultrasonic distance measurement principle of the driver when reversing the vehicle's gear onto R Block, start reversing radar, under the control of the controller, the device on the rear bumper of the probe Send ultrasonic encountered obstacles, generate echo signal, the sensor receives the echo signal data processing by the controller to calculate the distance between the body and the obstacles, determine the position of obstacles, then display shows the distance and issued warning signal, so the driver reversing so without hitting obstacles. The whole process, the driver need not look back they will know that the situation after the car, so parking and reversing easier and safer.