Gx-parking-3 Digital display and alarming by stage-by-stage varying sound to avoid calling. Sensor color optional. Digital LED showing distance Automatic detect obstacle when reversing. Super-wide detection angle USA Microchip CPU. quality guarantee USA super misinformation-proof technology, accurate and reliable. Digital display and different stage alarming by varying distance Stick-on or insert-in sensors for selection 2 and 4 sensors optional Sensor color optional. Product Technical Parameter working voltage : 10--15 V / DC Power : Pmax < 5W Working temperture : -20 ～+60 Display range : S <= 1.8 Warning range<= 1.5M Sound volume : .= 70 dB We can supply other type of goods you required,please contact us!