PROVIDE SAFETY: Help to provide increased safety for passengers, pedestrians and family members who happen to be around the moving vehicle. Avoid the dangerous and costly collisions that occur so easily behind the wheel</br>4 SENSORS: double CPU and advanced chipset to enhanced coverage and detection</br>LED DISPLAY - Equipped with colored LED digital display, which shows the distance between the car and obstacle</br>Buzzer Alarm together with voice with English speech alerts you section by section according different distance, closer the distance is, the alarm sound is shorter and rapider</br>ACCURATE: Accuracy of obstacle distance can reach to centimeter</br></br>Product Description</br></br><br>This reversing radar is made from premium quality materials to ensure durability and longevity. <br>It can be used to avoid dangerous for passengers, pedestrians and family members who happen to occur behind the wheel. <br>It can detect small children and low walls as well! <br><br> <b>Specifications:</b> <br>Material: Plastic <br>Voice: human voice <br>Sensor number: 4 <br>Mainframe size:3.54x2.36x0.9 inch( 9 x 6 x 2.3CM) <br>Operating voltage: DC12V <br>Directed range: front 0.3-0.8M rear0.3-2.5M <br>Operating temperature: -40 to 80 degree celsius<br>Operating current: 20～180mA <br>Ultrasonic frequency: 40KHz±1kHz <br>Alarm voltage:≥80dB<br>Total weight: 300g <br>Color: Black <br><br> <b>Package include: </b> <br>1 x microcomputer digital box <br>4 x sensor <br>1 x user manual <br>1 x vocal apparatus <br>1 x power line <br>1 x broach</br><br/>http://www.amazon.com/gp/product/B017XBYZL8