Parking Sensor/Auto Reversing Detector SB309F-4 Parking Sensor/Auto Reversing Detector with Detecting Distance of 0.3 - 2.0m Key Specifications/Special Features: LCD showing obstacle distance Alarm by Bi-Bi sound Colorized LCD screen The simulative vehicle is displayed in the colorized screen All kinds of sensor colors and styles are available High quality and easy to install With luminous sensors Technical parameters: Rated voltage: 12V DC Operating range: 10.5V - 16V DC Rated current: 50mA - 180mA Detecting distance: 0.3 - 2.0m Ultrasonic frequency: 40KHz Working temperature: -30 to +70 deg. C.