• Car parking sensor kit with 4 sensors, can be used as front and rear parking assistance system• High performance car parking sensor with Dual CPU system, improves safety when parking• System automatically activates when reverse gear is engaged• Indicates the distance of obstacles with different sound frequencies• Sensor detection range from 0.3m to 1.5m. The closer the obstacles, the louder and faster the sound alert• Alarm sound > 80 dB• Operating voltage 12V DC• Easy to install with step-by-step catalogue descriptions and diagrams