The system alerts a driver to the distance between the rear of a vehicle and an obstacle while reversing. It is precisely designed by Canadian engineers and manufactured with the highest quality standards. Various display and sensor type/quantity options are available. It comprises two or more sensors, a central control processor and a display panel or Audible Alert. The optional display panel produces an audible and visual warning. These instructions apply to all models, including Audible Alert only systems and models with Display Units. There is a range of different sensors available. Please ensure to read the sections that apply to the product you have purchased. System characteristics Multifunctional design. Parking sensor system and mobile function. Inve band, digital display. Remind you by digital number, direction voice and imitating-speed. Reliable aging experiment to obtain steady quality. Technology data Working voltage: 10~15V/DC Max power: pmax Working temperature: -40℃~+85℃ Display distance: S≤1.6m Alarming distance: S≤1.5m Alarming voice: ≥50Db