Specifications: 1. Digital LED showing obstacle distance 2. 4 sensors for rear available 3. Alarm by Bi-Bi sound 4. SmallLED display with two colors (Red & yellow) 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 Technical Parameters: 1. Rated Voltage: 12V DC 2. Operating Range: 10.5Ví½ 16V DC 3. Rated Current: 50mAí½ 180mA 4. Detecting Distance: 0.3í½ 2.0m 5. Ultrasonic Frequency: 40KHz 6. Display Working Temperature: -30 í½ +70íµ Packing Details: 1)Carton Size: 460mmX310mmX510mm 2) Quantity: 20 PCS/ CTN 3) G.W.: 14 KG 4) N.W.: 13 KG