Detailed Product Description 1.Rear & Front System. 2.Front detection ... .Operating temperature: -40~80. 10.Display Distance: Rear sensors: 0.4m~2.5m. Front sensors:0. ... 4m~0.8m. 11.Alarm Distance: Rear sensors: 0.1m~1.5m. Front sensors:0 ... Ultrasonic frequency: 40KHz product name:car parking sensor system,P1168B,auto parts,car accesscories,led,car parking sensor, parking sensor,auto parking sensor