Parking Aid with 4 sensors, black, with the built in speaker package: 4 x Sensors speaker control unit cable hole cutter drill bit staples and adhesive pad Instruction Manual in German (connection scheme) Product Description: The sensor indicates with an acoustic signal of how far away an obstacle. The middle the obstacle to your vehicle, the Haufiger Hsren you will find everything you need to know about the warning sounds. The sensors are spread apart as you insert the reverse. Technical Data: Power supply: 12 V DC Power Consumption: < 4 W Operating temperature -30 °C – + 70 °C Ultrasonic frequency (sensors): 40kHz display distance: 3 m – 0.3 m Measuring errors: +/-5 cm Msgliche Schrage the bumper sensor: +/-5, Diameter: 18 mm