Premium Parking Sensor System With the strictest quality certificate of Germany(E1): LED Type: 1.Model No. LF-PD01 Rainbowl LED Type: Key features: Switch on automatically when reverse gear is engaged 2/4 sensors design Three color LED Screen with clear display Digital, acoustic, vision and direction alert Embedded installation 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 LED Display Sound 1.50 to 1.10m Normal Speed Green Bi?Bi?Bi? 1.00 to 0.50m Low Speed Orange Bi..Bi..Bi.. 0.40 to 0.1m Stop Red Bi? (solid beeping)