Rainbow 4 Parking Sensors With LED Display Parking Radar Sensor Car Reverse Backup Radar Accuracy of obstacle distance can reach to centimeter, The sensor color is same as the car, like the original part. Real people voice with English speech alerts you section by section according different distance, closer the distance is, the alarm sound is shorter and rapider. Provide 4 sensitive ultrasonic sensors, ensures your traffic security omnibearingly, providing increased safety for passengers, pedestrians and family members who happen to be around the moving vehicle. Self-inspection system can automatically check abnormal condition itself, avoiding reversing collision due to damaged sensors. The logistic usually takes 13-18 days, But the warranty is one year.