LED Parking Sensor with Learning function

parking sensorsystem with learning function learning functionAutomatically identify spare tyre or tow-bar without false warning, remember it as part of the vehicleDifferent alarm sounds can remind the nearest obstruction lies on front or rearFront sound: BoBoBo Rear sound: BiBiBiOne LED display and one control unitOpposite indication on display represents front or rear directionFront and rear sensors for full front and rear coverageDisplay with built-in buzzer and alarm sound ON/OFF switch4, 6, 8 sensors is optionalRated voltage: 12V DC Operating range: 9-16VWorking temperature: -30 +80degree CelsiusRated current: 20 200mAUltrasonic frequency: 40kHzDetective range: Front: 0.3 0.8m Rear: 0.3 1.5mSize: 99mm*30mm*17mm