Number of sensors: 4; Colour: grey; Chemical Properties: Over-paintable; Sensor Type: Ultrasonic Sensor; Loudspeaker: Yes; Supplementary Article / Supplementary Info Info 2: with sensor, with mounting manual; Fitting Position: Rear; Diameter of visible sensor surface [mm]: 21.5; Direct Current [V]: 12; Power Consumption [W]: <4; Frequency Range [MHz]: 0.04; Reach [m]: 3.0-0.3; Measurement Accuracy +/- [mm]: 50; Operating temperature from [°C]: -30; Operating temperature to [C°]: +70; Gauge: without Display; Parking sensors kit