Specifications: 1. Digital LCD showing obstacle distance 2. 4 sensors are available 3. Alarm by Bi-Bi sound 4. colorized LCD screen 5. The simulative vehicle is displayed in the colorized screen 6. All kinds of sensor colors and styles are available 7. High quality and easy to install Technical: 1. Rated Voltage: 12V DC 2. Operating Range: 10.5V to 16V DC 3. Rated Current: 50mA to 180mA 4. Detecting Distance: 0.3 to 2.0m 5. Ultrasonic Frequency: 40KHz 6. Display Working Temperature: -30 to +70 Centigrade