1.Figures show obstacle distance accuracy; 2.Human voice+Alarm double tips; 3.Color band display; detection range 0 ... and image overlayFigures show accurate obstacle distance Alarm double tipsReal voice remind the distanceNight vision,great view ,waterproof ,high-definition ... frequency:40KHzWorking temperature of control box:-30~+80°C human voice parking sensor system with voice&distance led display