Specifications: 1.Digital LED showing obstcale distance 2.Alarm by BIBI sound 3.LED display with two colors (red and yellow) 4.Crescent shape digital display screen 5.All kinds of sensor colors and styles are available 6.Voice on/off optional 7.High-quality and easy to install Technia: 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. Display Working Temperature: -30 - +70