... switch:on/off 2.Step-up buzzer alarm car reversing parking sensor 1,Numeral and color LED display2, Step-up buzzer alarm3 ... alarm switch:on/off7,2,4 sensors for option TypeLED Parking sensorBrandNeutralModel SP-580Display Type LEDAlarm BiBiApplicable typeGeneralSensors4Detection Range0.3-1 ...