What is the main benefit of Parking Assist System? As we know， in the back of the car， there is an inevitable blind area of the owners. The accidents caused by reversing have damaged property and casualties. Welcome to our website， today， we are glad to give you a recommendation of this 4 x Detector LED Displayer Voice Alarm Parking Assist System with BIBI 065-4 Black. Equipped with this product， the drivers can solve reversing trouble and reduce the clean cut of the vehicle and traffic accidents. In addition， it plays an important role in the bad weather， insufficient light environment.                                    Features            Convenient and practicalSimple operation， easy to useStrong stability and reliabilityReduce the clean cut of the vehicle and traffic accidentsMade of high quality material                                                             Specifications            Rate Voltage    12V    <br>Operation Voltage Rang    9-16V    <br>Rated Current    20-200mA    <br>Detecting Distance    0-2.5m    <br>Ultrasonic Frequency    40KHz    <br>Working Temperature    -30℃-+70℃    <br>Display Working Temperature    -20℃-+60℃    <br>Color    Black    <br>Weight    18.24oz / 517g    <br>Dimensions    3.54 x 2.36 x 0.78" / 9 x 6 x2cm(L x W x H)     <br>                                                            Package Includes            1 x Mainbox1 x LED Digital Displayer4 x Detector1 x Drill1 x Powe Line1 x User Manual2x Double Rubber