Evolve your entire safety system with this 3-in-1 kit, featuring a replacement number plate mounted camera, 4.3" colour monitor and 2 parking sensors. 2 Video Inputs. Operating Voltage: 12V DC. Detection Angle: <60 Degrees (V & H). Detection Range: 0.3 to 2.0m. Buzzer Volume: 83dB. Number Plate Surround Size: 550mm x 140mm.