1.stable performance 2.resistant to high and low tempreture 3.small account of change,and can make based on your charge Safety Backup Reverse Parking Sensor 1.stable performance2.resistant to high and low tempreture3.small account of change,and can make based on your chargeProduct description working frequency(KHz)40KHz±1.0KHzsound pressure(dB)≥94dB(10cm/10Vrms sine wave)sensitivity(dB)≥-82dB/v/u ...