1. Wireless CPU to display communications, there are not any wire between the main board and the display. 2. Digital LCD showing obstacle distance 3. Alarm by Bi-Bi sound 4. Colorized LCD screen 5. Crescent shape digital display screen 6.The simulative vehicle is displayed in the colorized screen 7. All kinds of sensor colors and styles are available 8. High quality and easy to install Technical: 1. Rated Voltage: 12V DC 2. Operating Range: 10.5V～ 16V DC 3. Rated Current: 50mA～ 180mA 4. Detecting Distance: 0.3～ 2.0m 5. Ultrasonic Frequency: 40KHz 6. HF Frequency: 315MHz / 433MHz 7. Display Working Temperature: -30 ～ +70℃