Wireless LED parking sensor  1. Wireless CPU to display communications, there are  not any wire between the main board and the display. 2. Digital LED showing obstacle distance 3. Alarm by Bi-Bi sound 4. LED display with three colors (Red, yellow & green) 5. Crescent shape digital display screen 6. Turn on/off the voice according to your desire 7. All kinds of sensor colors and styles are available 8. High quality and easy to install Technicial: 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℃