Premium Parking Sensor System With the strictest quality certificate of Germany(E1): 1.Model No. LF-PR01 Rearview Mirror Type : Key features: Switch on automatically when reverse gear is engaged 4 sensors design Rear view mirror display design VFD display mode Requested to replace the original rear view mirror Indoor temperature display on rear view mirror Apply to many types of car During back a car, it shows distance of back obstacles; during normal drive, it shows the car inside temperature Technical data: Working Voltage: 10~ 15 V Max. Power: 3.6W Working temperature: - 35°C~ + 70 °C Detecting distance: 0.1 m ~ 1.5 m Measuring error: ±0.05 m Sensor detection angle: 60 ° Alarming Volume of built-in Siren: 80dB Alarming Volume of external Siren: 80dB Response Time: 250 ms Ultrasonic Frequency: 40KHz Current Consumption: 240~300 mA Audible/Visual Distance Indication Distance Area VFD Display Sound 1.50 to 1.10m Normal Speed Show positions and distance of obstacle Bi...Bi...Bi... 1.00 to 0.50m Low Speed Bi..Bi..Bi.. 0.40 to 0.1m Stop Bi.(solid beeping)