Feature:1. he sever colors display for orientation of obstacles 2. The provoke design for voice & digital make it more harmonious & attractive 3. The humanity design & human voice notification for distance f obstacles (Vocal)4. Prevent from corner colliding & impacting with special design for easy operating 5. The vocal notification of Bi-Bi & digital distance display show the characteristics, especially at night 6. The appearance of sensor & body for vehicle is a perfect match, just like original binding accessories Specification: Sensor Color Blue, Gold, Red, Silver, White Central Control Size Approx 9.7x 7.2x 2.8CM / 3.82x 2.83x 11.02 Inch LED Monitor Size Approx 9.9x 1.9x 2.2CM / 3.9x 0.7x 0.9 Inch Sensor Cable Length Approx 2.5 Meter / 8.2ft Extended Cable Length Approx 4 Meter / 13.1ft Operating Voltage DC12V2 V Operating Temperature-20℃ ~ 70℃ Operating Eelectric Current 200m A50m A Detective Range Front: 0.3--.08m/ 11.81--31.50 Back: 0.3--2.0m/ 11.81--78.74 Detective angle: H80, V70 Package Included:1 X Central Control 1 X LED Monitor 8 X Sensors 1 X 22mm Hole Saw 2 X Double Side Stickers 1 X Power Cable 1 X Users Manual